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Finding the Fourth Proportional to 485.51, 728.01 and 177.29

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Solution

The fourth proportional to 485.51, 728.01 and 177.29 is: 265.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.51 : 728.01 = 177.29 : x
  2. Step 2: Convert to fraction form
    485.51/728.01 = 177.29/x
  3. Step 3: Cross multiply
    485.51x = 728.01 × 177.29
  4. Step 4: Simplify right side
    485.51x = 129,065.25
  5. Step 5: Solve for x
    x = 129,065.25/485.51
  6. Step 6: Final answer
    x = 265.84

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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.