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Finding the Fourth Proportional to 639.03, 954.16 and 572.71

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Solution

The fourth proportional to 639.03, 954.16 and 572.71 is: 855.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.03 : 954.16 = 572.71 : x
  2. Step 2: Convert to fraction form
    639.03/954.16 = 572.71/x
  3. Step 3: Cross multiply
    639.03x = 954.16 × 572.71
  4. Step 4: Simplify right side
    639.03x = 546,456.97
  5. Step 5: Solve for x
    x = 546,456.97/639.03
  6. Step 6: Final answer
    x = 855.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.