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Finding the Fourth Proportional to 529.47, 730.62 and 308.61

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Solution

The fourth proportional to 529.47, 730.62 and 308.61 is: 425.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.47 : 730.62 = 308.61 : x
  2. Step 2: Convert to fraction form
    529.47/730.62 = 308.61/x
  3. Step 3: Cross multiply
    529.47x = 730.62 × 308.61
  4. Step 4: Simplify right side
    529.47x = 225,476.64
  5. Step 5: Solve for x
    x = 225,476.64/529.47
  6. Step 6: Final answer
    x = 425.85

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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.