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Finding the Fourth Proportional to 763.92, 1,145.84 and 373.76

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Solution

The fourth proportional to 763.92, 1,145.84 and 373.76 is: 560.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.92 : 1,145.84 = 373.76 : x
  2. Step 2: Convert to fraction form
    763.92/1,145.84 = 373.76/x
  3. Step 3: Cross multiply
    763.92x = 1,145.84 × 373.76
  4. Step 4: Simplify right side
    763.92x = 428,269.16
  5. Step 5: Solve for x
    x = 428,269.16/763.92
  6. Step 6: Final answer
    x = 560.62

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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.