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Finding the Fourth Proportional to 4,765, 7,150.74 and 1,687

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Solution

The fourth proportional to 4,765, 7,150.74 and 1,687 is: 2,531.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,765 : 7,150.74 = 1,687 : x
  2. Step 2: Convert to fraction form
    4,765/7,150.74 = 1,687/x
  3. Step 3: Cross multiply
    4,765x = 7,150.74 × 1,687
  4. Step 4: Simplify right side
    4,765x = 12,063,298.38
  5. Step 5: Solve for x
    x = 12,063,298.38/4,765
  6. Step 6: Final answer
    x = 2,531.65

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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.