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Finding the Fourth Proportional to 737.92, 1,019.28 and 641.44

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Solution

The fourth proportional to 737.92, 1,019.28 and 641.44 is: 886.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.92 : 1,019.28 = 641.44 : x
  2. Step 2: Convert to fraction form
    737.92/1,019.28 = 641.44/x
  3. Step 3: Cross multiply
    737.92x = 1,019.28 × 641.44
  4. Step 4: Simplify right side
    737.92x = 653,806.96
  5. Step 5: Solve for x
    x = 653,806.96/737.92
  6. Step 6: Final answer
    x = 886.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.