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Finding the Fourth Proportional to 3,115.67, 4,672.71 and 923.89

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Solution

The fourth proportional to 3,115.67, 4,672.71 and 923.89 is: 1,385.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.67 : 4,672.71 = 923.89 : x
  2. Step 2: Convert to fraction form
    3,115.67/4,672.71 = 923.89/x
  3. Step 3: Cross multiply
    3,115.67x = 4,672.71 × 923.89
  4. Step 4: Simplify right side
    3,115.67x = 4,317,070.04
  5. Step 5: Solve for x
    x = 4,317,070.04/3,115.67
  6. Step 6: Final answer
    x = 1,385.60

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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.