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Finding the Fourth Proportional to 715.92, 1,074.20 and 369.04

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Solution

The fourth proportional to 715.92, 1,074.20 and 369.04 is: 553.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.92 : 1,074.20 = 369.04 : x
  2. Step 2: Convert to fraction form
    715.92/1,074.20 = 369.04/x
  3. Step 3: Cross multiply
    715.92x = 1,074.20 × 369.04
  4. Step 4: Simplify right side
    715.92x = 396,422.77
  5. Step 5: Solve for x
    x = 396,422.77/715.92
  6. Step 6: Final answer
    x = 553.72

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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.