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Finding the Fourth Proportional to 673,414.12, 929,470.48 and 387,100.28

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Solution

The fourth proportional to 673,414.12, 929,470.48 and 387,100.28 is: 534,289.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,414.12 : 929,470.48 = 387,100.28 : x
  2. Step 2: Convert to fraction form
    673,414.12/929,470.48 = 387,100.28/x
  3. Step 3: Cross multiply
    673,414.12x = 929,470.48 × 387,100.28
  4. Step 4: Simplify right side
    673,414.12x = 359,798,283,059.73
  5. Step 5: Solve for x
    x = 359,798,283,059.73/673,414.12
  6. Step 6: Final answer
    x = 534,289.78

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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.