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Finding the Fourth Proportional to 1,001.31, 1,501.97 and 615.75

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Solution

The fourth proportional to 1,001.31, 1,501.97 and 615.75 is: 923.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.31 : 1,501.97 = 615.75 : x
  2. Step 2: Convert to fraction form
    1,001.31/1,501.97 = 615.75/x
  3. Step 3: Cross multiply
    1,001.31x = 1,501.97 × 615.75
  4. Step 4: Simplify right side
    1,001.31x = 924,834.95
  5. Step 5: Solve for x
    x = 924,834.95/1,001.31
  6. Step 6: Final answer
    x = 923.63

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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.