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Finding the Fourth Proportional to 545.40, 752.72 and 324.24

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Solution

The fourth proportional to 545.40, 752.72 and 324.24 is: 447.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.40 : 752.72 = 324.24 : x
  2. Step 2: Convert to fraction form
    545.40/752.72 = 324.24/x
  3. Step 3: Cross multiply
    545.40x = 752.72 × 324.24
  4. Step 4: Simplify right side
    545.40x = 244,061.93
  5. Step 5: Solve for x
    x = 244,061.93/545.40
  6. Step 6: Final answer
    x = 447.49

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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.