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Finding the Fourth Proportional to 638,410.10, 957,615.15 and 372,470.90

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Solution

The fourth proportional to 638,410.10, 957,615.15 and 372,470.90 is: 558,706.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,410.10 : 957,615.15 = 372,470.90 : x
  2. Step 2: Convert to fraction form
    638,410.10/957,615.15 = 372,470.90/x
  3. Step 3: Cross multiply
    638,410.10x = 957,615.15 × 372,470.90
  4. Step 4: Simplify right side
    638,410.10x = 356,683,776,774.14
  5. Step 5: Solve for x
    x = 356,683,776,774.14/638,410.10
  6. Step 6: Final answer
    x = 558,706.35

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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.