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Finding the Fourth Proportional to 643,729.92, 888,454.08 and 375,457.92

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Solution

The fourth proportional to 643,729.92, 888,454.08 and 375,457.92 is: 518,194.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,729.92 : 888,454.08 = 375,457.92 : x
  2. Step 2: Convert to fraction form
    643,729.92/888,454.08 = 375,457.92/x
  3. Step 3: Cross multiply
    643,729.92x = 888,454.08 × 375,457.92
  4. Step 4: Simplify right side
    643,729.92x = 333,577,120,892.31
  5. Step 5: Solve for x
    x = 333,577,120,892.31/643,729.92
  6. Step 6: Final answer
    x = 518,194.22

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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.