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Finding the Fourth Proportional to 487.22, 671.29 and 425.12

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Solution

The fourth proportional to 487.22, 671.29 and 425.12 is: 585.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.22 : 671.29 = 425.12 : x
  2. Step 2: Convert to fraction form
    487.22/671.29 = 425.12/x
  3. Step 3: Cross multiply
    487.22x = 671.29 × 425.12
  4. Step 4: Simplify right side
    487.22x = 285,374.39
  5. Step 5: Solve for x
    x = 285,374.39/487.22
  6. Step 6: Final answer
    x = 585.73

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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.