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Finding the Fourth Proportional to 529.61, 794.86 and 425.72

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Solution

The fourth proportional to 529.61, 794.86 and 425.72 is: 638.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.61 : 794.86 = 425.72 : x
  2. Step 2: Convert to fraction form
    529.61/794.86 = 425.72/x
  3. Step 3: Cross multiply
    529.61x = 794.86 × 425.72
  4. Step 4: Simplify right side
    529.61x = 338,391.12
  5. Step 5: Solve for x
    x = 338,391.12/529.61
  6. Step 6: Final answer
    x = 638.95

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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.