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Finding the Fourth Proportional to 638,411.60, 957,617.40 and 372,472.40

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Solution

The fourth proportional to 638,411.60, 957,617.40 and 372,472.40 is: 558,708.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,411.60 : 957,617.40 = 372,472.40 : x
  2. Step 2: Convert to fraction form
    638,411.60/957,617.40 = 372,472.40/x
  3. Step 3: Cross multiply
    638,411.60x = 957,617.40 × 372,472.40
  4. Step 4: Simplify right side
    638,411.60x = 356,686,051,259.76
  5. Step 5: Solve for x
    x = 356,686,051,259.76/638,411.60
  6. Step 6: Final answer
    x = 558,708.60

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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.