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Finding the Fourth Proportional to 461.03, 691.80 and 459.65

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Solution

The fourth proportional to 461.03, 691.80 and 459.65 is: 689.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.03 : 691.80 = 459.65 : x
  2. Step 2: Convert to fraction form
    461.03/691.80 = 459.65/x
  3. Step 3: Cross multiply
    461.03x = 691.80 × 459.65
  4. Step 4: Simplify right side
    461.03x = 317,985.87
  5. Step 5: Solve for x
    x = 317,985.87/461.03
  6. Step 6: Final answer
    x = 689.73

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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.