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Finding the Fourth Proportional to 386.52, 529.70 and 349.62

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Solution

The fourth proportional to 386.52, 529.70 and 349.62 is: 479.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.52 : 529.70 = 349.62 : x
  2. Step 2: Convert to fraction form
    386.52/529.70 = 349.62/x
  3. Step 3: Cross multiply
    386.52x = 529.70 × 349.62
  4. Step 4: Simplify right side
    386.52x = 185,191.97
  5. Step 5: Solve for x
    x = 185,191.97/386.52
  6. Step 6: Final answer
    x = 479.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.