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Finding the Fourth Proportional to 356,638.80, 534,663.36 and 278,101.20

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Solution

The fourth proportional to 356,638.80, 534,663.36 and 278,101.20 is: 416,921.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,638.80 : 534,663.36 = 278,101.20 : x
  2. Step 2: Convert to fraction form
    356,638.80/534,663.36 = 278,101.20/x
  3. Step 3: Cross multiply
    356,638.80x = 534,663.36 × 278,101.20
  4. Step 4: Simplify right side
    356,638.80x = 148,690,522,012.03
  5. Step 5: Solve for x
    x = 148,690,522,012.03/356,638.80
  6. Step 6: Final answer
    x = 416,921.89

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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.