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Finding the Fourth Proportional to 285,570.80, 428,635.08 and 238,487.12

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Solution

The fourth proportional to 285,570.80, 428,635.08 and 238,487.12 is: 357,963.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,570.80 : 428,635.08 = 238,487.12 : x
  2. Step 2: Convert to fraction form
    285,570.80/428,635.08 = 238,487.12/x
  3. Step 3: Cross multiply
    285,570.80x = 428,635.08 × 238,487.12
  4. Step 4: Simplify right side
    285,570.80x = 102,223,945,760.17
  5. Step 5: Solve for x
    x = 102,223,945,760.17/285,570.80
  6. Step 6: Final answer
    x = 357,963.58

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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.