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Finding the Fourth Proportional to 696,009.28, 960,560.22 and 390,137.62

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Solution

The fourth proportional to 696,009.28, 960,560.22 and 390,137.62 is: 538,427.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,009.28 : 960,560.22 = 390,137.62 : x
  2. Step 2: Convert to fraction form
    696,009.28/960,560.22 = 390,137.62/x
  3. Step 3: Cross multiply
    696,009.28x = 960,560.22 × 390,137.62
  4. Step 4: Simplify right side
    696,009.28x = 374,750,678,097.48
  5. Step 5: Solve for x
    x = 374,750,678,097.48/696,009.28
  6. Step 6: Final answer
    x = 538,427.70

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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.