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Finding the Fourth Proportional to 393,091.80, 542,411.88 and 220,986.24

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Solution

The fourth proportional to 393,091.80, 542,411.88 and 220,986.24 is: 304,930.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,091.80 : 542,411.88 = 220,986.24 : x
  2. Step 2: Convert to fraction form
    393,091.80/542,411.88 = 220,986.24/x
  3. Step 3: Cross multiply
    393,091.80x = 542,411.88 × 220,986.24
  4. Step 4: Simplify right side
    393,091.80x = 119,865,561,892.53
  5. Step 5: Solve for x
    x = 119,865,561,892.53/393,091.80
  6. Step 6: Final answer
    x = 304,930.20

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1.5x scale

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.