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Finding the Fourth Proportional to 485.32, 728.10 and 160.69

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Solution

The fourth proportional to 485.32, 728.10 and 160.69 is: 241.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.32 : 728.10 = 160.69 : x
  2. Step 2: Convert to fraction form
    485.32/728.10 = 160.69/x
  3. Step 3: Cross multiply
    485.32x = 728.10 × 160.69
  4. Step 4: Simplify right side
    485.32x = 116,998.39
  5. Step 5: Solve for x
    x = 116,998.39/485.32
  6. Step 6: Final answer
    x = 241.07

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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.