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Finding the Fourth Proportional to 1,143.26, 1,715.20 and 373.76

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Solution

The fourth proportional to 1,143.26, 1,715.20 and 373.76 is: 560.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.26 : 1,715.20 = 373.76 : x
  2. Step 2: Convert to fraction form
    1,143.26/1,715.20 = 373.76/x
  3. Step 3: Cross multiply
    1,143.26x = 1,715.20 × 373.76
  4. Step 4: Simplify right side
    1,143.26x = 641,073.15
  5. Step 5: Solve for x
    x = 641,073.15/1,143.26
  6. Step 6: Final answer
    x = 560.74

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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.