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Finding the Fourth Proportional to 938.12, 1,294.72 and 545.06

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Solution

The fourth proportional to 938.12, 1,294.72 and 545.06 is: 752.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.12 : 1,294.72 = 545.06 : x
  2. Step 2: Convert to fraction form
    938.12/1,294.72 = 545.06/x
  3. Step 3: Cross multiply
    938.12x = 1,294.72 × 545.06
  4. Step 4: Simplify right side
    938.12x = 705,701.96
  5. Step 5: Solve for x
    x = 705,701.96/938.12
  6. Step 6: Final answer
    x = 752.26

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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.