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Finding the Fourth Proportional to 638,642,402.70, 957,963,604.05 and 638,642,402.70

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Solution

The fourth proportional to 638,642,402.70, 957,963,604.05 and 638,642,402.70 is: 957,963,604.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,642,402.70 : 957,963,604.05 = 638,642,402.70 : x
  2. Step 2: Convert to fraction form
    638,642,402.70/957,963,604.05 = 638,642,402.70/x
  3. Step 3: Cross multiply
    638,642,402.70x = 957,963,604.05 × 638,642,402.70
  4. Step 4: Simplify right side
    638,642,402.70x = 611,796,177,789,643,520
  5. Step 5: Solve for x
    x = 611,796,177,789,643,520/638,642,402.70
  6. Step 6: Final answer
    x = 957,963,604.05

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.