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Finding the Fourth Proportional to 932.40, 1,398.68 and 283.60

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Solution

The fourth proportional to 932.40, 1,398.68 and 283.60 is: 425.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.40 : 1,398.68 = 283.60 : x
  2. Step 2: Convert to fraction form
    932.40/1,398.68 = 283.60/x
  3. Step 3: Cross multiply
    932.40x = 1,398.68 × 283.60
  4. Step 4: Simplify right side
    932.40x = 396,665.65
  5. Step 5: Solve for x
    x = 396,665.65/932.40
  6. Step 6: Final answer
    x = 425.42

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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.