Home / 1,218,076,019.28-1,680,901,414.31-689,428,655.17

Finding the Fourth Proportional to 1,218,076,019.28, 1,680,901,414.31 and 689,428,655.17

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Solution

The fourth proportional to 1,218,076,019.28, 1,680,901,414.31 and 689,428,655.17 is: 951,386,927.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,076,019.28 : 1,680,901,414.31 = 689,428,655.17 : x
  2. Step 2: Convert to fraction form
    1,218,076,019.28/1,680,901,414.31 = 689,428,655.17/x
  3. Step 3: Cross multiply
    1,218,076,019.28x = 1,680,901,414.31 × 689,428,655.17
  4. Step 4: Simplify right side
    1,218,076,019.28x = 1,158,861,601,538,615,552
  5. Step 5: Solve for x
    x = 1,158,861,601,538,615,552/1,218,076,019.28
  6. Step 6: Final answer
    x = 951,386,927.58

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.