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Finding the Fourth Proportional to 485.82, 728.84 and 177.92

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Solution

The fourth proportional to 485.82, 728.84 and 177.92 is: 266.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.82 : 728.84 = 177.92 : x
  2. Step 2: Convert to fraction form
    485.82/728.84 = 177.92/x
  3. Step 3: Cross multiply
    485.82x = 728.84 × 177.92
  4. Step 4: Simplify right side
    485.82x = 129,670.68
  5. Step 5: Solve for x
    x = 129,670.68/485.82
  6. Step 6: Final answer
    x = 266.91

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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.