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Finding the Fourth Proportional to 638,577,010.80, 957,865,516.20 and 627,815,330.55

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Solution

The fourth proportional to 638,577,010.80, 957,865,516.20 and 627,815,330.55 is: 941,722,995.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,577,010.80 : 957,865,516.20 = 627,815,330.55 : x
  2. Step 2: Convert to fraction form
    638,577,010.80/957,865,516.20 = 627,815,330.55/x
  3. Step 3: Cross multiply
    638,577,010.80x = 957,865,516.20 × 627,815,330.55
  4. Step 4: Simplify right side
    638,577,010.80x = 601,362,655,675,549,312
  5. Step 5: Solve for x
    x = 601,362,655,675,549,312/638,577,010.80
  6. Step 6: Final answer
    x = 941,722,995.83

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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.