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Finding the Fourth Proportional to 497.75, 686.90 and 342.77

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Solution

The fourth proportional to 497.75, 686.90 and 342.77 is: 473.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.75 : 686.90 = 342.77 : x
  2. Step 2: Convert to fraction form
    497.75/686.90 = 342.77/x
  3. Step 3: Cross multiply
    497.75x = 686.90 × 342.77
  4. Step 4: Simplify right side
    497.75x = 235,447.00
  5. Step 5: Solve for x
    x = 235,447.00/497.75
  6. Step 6: Final answer
    x = 473.02

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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.