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Finding the Fourth Proportional to 720.34, 994.11 and 545.38

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Solution

The fourth proportional to 720.34, 994.11 and 545.38 is: 752.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.34 : 994.11 = 545.38 : x
  2. Step 2: Convert to fraction form
    720.34/994.11 = 545.38/x
  3. Step 3: Cross multiply
    720.34x = 994.11 × 545.38
  4. Step 4: Simplify right side
    720.34x = 542,167.71
  5. Step 5: Solve for x
    x = 542,167.71/720.34
  6. Step 6: Final answer
    x = 752.66

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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.