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Finding the Fourth Proportional to 932.30, 1,398.48 and 339.30

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Solution

The fourth proportional to 932.30, 1,398.48 and 339.30 is: 508.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.30 : 1,398.48 = 339.30 : x
  2. Step 2: Convert to fraction form
    932.30/1,398.48 = 339.30/x
  3. Step 3: Cross multiply
    932.30x = 1,398.48 × 339.30
  4. Step 4: Simplify right side
    932.30x = 474,504.26
  5. Step 5: Solve for x
    x = 474,504.26/932.30
  6. Step 6: Final answer
    x = 508.96

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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.