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Finding the Fourth Proportional to 485.61, 731.82 and 436.92

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Solution

The fourth proportional to 485.61, 731.82 and 436.92 is: 658.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.61 : 731.82 = 436.92 : x
  2. Step 2: Convert to fraction form
    485.61/731.82 = 436.92/x
  3. Step 3: Cross multiply
    485.61x = 731.82 × 436.92
  4. Step 4: Simplify right side
    485.61x = 319,743.43
  5. Step 5: Solve for x
    x = 319,743.43/485.61
  6. Step 6: Final answer
    x = 658.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.