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Finding the Fourth Proportional to 486,635.64, 725,455.20 and 478,966.56

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Solution

The fourth proportional to 486,635.64, 725,455.20 and 478,966.56 is: 714,022.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,635.64 : 725,455.20 = 478,966.56 : x
  2. Step 2: Convert to fraction form
    486,635.64/725,455.20 = 478,966.56/x
  3. Step 3: Cross multiply
    486,635.64x = 725,455.20 × 478,966.56
  4. Step 4: Simplify right side
    486,635.64x = 347,468,781,578.11
  5. Step 5: Solve for x
    x = 347,468,781,578.11/486,635.64
  6. Step 6: Final answer
    x = 714,022.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.