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Finding the Fourth Proportional to 938.56, 1,294.90 and 545.72

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Solution

The fourth proportional to 938.56, 1,294.90 and 545.72 is: 752.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.56 : 1,294.90 = 545.72 : x
  2. Step 2: Convert to fraction form
    938.56/1,294.90 = 545.72/x
  3. Step 3: Cross multiply
    938.56x = 1,294.90 × 545.72
  4. Step 4: Simplify right side
    938.56x = 706,652.83
  5. Step 5: Solve for x
    x = 706,652.83/938.56
  6. Step 6: Final answer
    x = 752.91

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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.