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Finding the Fourth Proportional to 482.52, 721.98 and 455.16

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Solution

The fourth proportional to 482.52, 721.98 and 455.16 is: 681.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.52 : 721.98 = 455.16 : x
  2. Step 2: Convert to fraction form
    482.52/721.98 = 455.16/x
  3. Step 3: Cross multiply
    482.52x = 721.98 × 455.16
  4. Step 4: Simplify right side
    482.52x = 328,616.42
  5. Step 5: Solve for x
    x = 328,616.42/482.52
  6. Step 6: Final answer
    x = 681.04

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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.