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Finding the Fourth Proportional to 497.55, 686.84 and 379.53

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Solution

The fourth proportional to 497.55, 686.84 and 379.53 is: 523.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.55 : 686.84 = 379.53 : x
  2. Step 2: Convert to fraction form
    497.55/686.84 = 379.53/x
  3. Step 3: Cross multiply
    497.55x = 686.84 × 379.53
  4. Step 4: Simplify right side
    497.55x = 260,671.05
  5. Step 5: Solve for x
    x = 260,671.05/497.55
  6. Step 6: Final answer
    x = 523.91

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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.