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Finding the Fourth Proportional to 447.17, 615.76 and 425.30

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Solution

The fourth proportional to 447.17, 615.76 and 425.30 is: 585.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.17 : 615.76 = 425.30 : x
  2. Step 2: Convert to fraction form
    447.17/615.76 = 425.30/x
  3. Step 3: Cross multiply
    447.17x = 615.76 × 425.30
  4. Step 4: Simplify right side
    447.17x = 261,878.59
  5. Step 5: Solve for x
    x = 261,878.59/447.17
  6. Step 6: Final answer
    x = 585.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.