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Finding the Fourth Proportional to 463,616.76, 639,162.96 and 396,356.28

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Solution

The fourth proportional to 463,616.76, 639,162.96 and 396,356.28 is: 546,434.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,616.76 : 639,162.96 = 396,356.28 : x
  2. Step 2: Convert to fraction form
    463,616.76/639,162.96 = 396,356.28/x
  3. Step 3: Cross multiply
    463,616.76x = 639,162.96 × 396,356.28
  4. Step 4: Simplify right side
    463,616.76x = 253,336,253,139.39
  5. Step 5: Solve for x
    x = 253,336,253,139.39/463,616.76
  6. Step 6: Final answer
    x = 546,434.63

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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.