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Finding the Fourth Proportional to 485.48, 727.64 and 225.13

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Solution

The fourth proportional to 485.48, 727.64 and 225.13 is: 337.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.48 : 727.64 = 225.13 : x
  2. Step 2: Convert to fraction form
    485.48/727.64 = 225.13/x
  3. Step 3: Cross multiply
    485.48x = 727.64 × 225.13
  4. Step 4: Simplify right side
    485.48x = 163,813.59
  5. Step 5: Solve for x
    x = 163,813.59/485.48
  6. Step 6: Final answer
    x = 337.43

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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.