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Finding the Fourth Proportional to 572.73, 859.08 and 139.88

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Solution

The fourth proportional to 572.73, 859.08 and 139.88 is: 209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.73 : 859.08 = 139.88 : x
  2. Step 2: Convert to fraction form
    572.73/859.08 = 139.88/x
  3. Step 3: Cross multiply
    572.73x = 859.08 × 139.88
  4. Step 4: Simplify right side
    572.73x = 120,168.11
  5. Step 5: Solve for x
    x = 120,168.11/572.73
  6. Step 6: Final answer
    x = 209.82

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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.