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Finding the Fourth Proportional to 529.48, 730.79 and 308.49

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Solution

The fourth proportional to 529.48, 730.79 and 308.49 is: 425.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.48 : 730.79 = 308.49 : x
  2. Step 2: Convert to fraction form
    529.48/730.79 = 308.49/x
  3. Step 3: Cross multiply
    529.48x = 730.79 × 308.49
  4. Step 4: Simplify right side
    529.48x = 225,441.41
  5. Step 5: Solve for x
    x = 225,441.41/529.48
  6. Step 6: Final answer
    x = 425.78

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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.