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Finding the Fourth Proportional to 485.27, 728.01 and 177.07

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Solution

The fourth proportional to 485.27, 728.01 and 177.07 is: 265.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.27 : 728.01 = 177.07 : x
  2. Step 2: Convert to fraction form
    485.27/728.01 = 177.07/x
  3. Step 3: Cross multiply
    485.27x = 728.01 × 177.07
  4. Step 4: Simplify right side
    485.27x = 128,906.91
  5. Step 5: Solve for x
    x = 128,906.91/485.27
  6. Step 6: Final answer
    x = 265.64

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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.