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Finding the Fourth Proportional to 545.73, 753.21 and 324.87

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Solution

The fourth proportional to 545.73, 753.21 and 324.87 is: 448.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.73 : 753.21 = 324.87 : x
  2. Step 2: Convert to fraction form
    545.73/753.21 = 324.87/x
  3. Step 3: Cross multiply
    545.73x = 753.21 × 324.87
  4. Step 4: Simplify right side
    545.73x = 244,695.33
  5. Step 5: Solve for x
    x = 244,695.33/545.73
  6. Step 6: Final answer
    x = 448.38

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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.