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Finding the Fourth Proportional to 462.61, 691.80 and 345.56

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Solution

The fourth proportional to 462.61, 691.80 and 345.56 is: 516.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.61 : 691.80 = 345.56 : x
  2. Step 2: Convert to fraction form
    462.61/691.80 = 345.56/x
  3. Step 3: Cross multiply
    462.61x = 691.80 × 345.56
  4. Step 4: Simplify right side
    462.61x = 239,054.95
  5. Step 5: Solve for x
    x = 239,054.95/462.61
  6. Step 6: Final answer
    x = 516.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.