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Finding the Fourth Proportional to 486.18, 727.20 and 451.16

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Solution

The fourth proportional to 486.18, 727.20 and 451.16 is: 674.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.18 : 727.20 = 451.16 : x
  2. Step 2: Convert to fraction form
    486.18/727.20 = 451.16/x
  3. Step 3: Cross multiply
    486.18x = 727.20 × 451.16
  4. Step 4: Simplify right side
    486.18x = 328,083.55
  5. Step 5: Solve for x
    x = 328,083.55/486.18
  6. Step 6: Final answer
    x = 674.82

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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.