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Finding the Fourth Proportional to 932.65, 1,398.61 and 384.64

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Solution

The fourth proportional to 932.65, 1,398.61 and 384.64 is: 576.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.65 : 1,398.61 = 384.64 : x
  2. Step 2: Convert to fraction form
    932.65/1,398.61 = 384.64/x
  3. Step 3: Cross multiply
    932.65x = 1,398.61 × 384.64
  4. Step 4: Simplify right side
    932.65x = 537,961.35
  5. Step 5: Solve for x
    x = 537,961.35/932.65
  6. Step 6: Final answer
    x = 576.81

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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.