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Finding the Fourth Proportional to 498.41, 686.24 and 423.57

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Solution

The fourth proportional to 498.41, 686.24 and 423.57 is: 583.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.41 : 686.24 = 423.57 : x
  2. Step 2: Convert to fraction form
    498.41/686.24 = 423.57/x
  3. Step 3: Cross multiply
    498.41x = 686.24 × 423.57
  4. Step 4: Simplify right side
    498.41x = 290,670.68
  5. Step 5: Solve for x
    x = 290,670.68/498.41
  6. Step 6: Final answer
    x = 583.20

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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.