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Finding the Fourth Proportional to 545.27, 817.90 and 448.69

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Solution

The fourth proportional to 545.27, 817.90 and 448.69 is: 673.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.27 : 817.90 = 448.69 : x
  2. Step 2: Convert to fraction form
    545.27/817.90 = 448.69/x
  3. Step 3: Cross multiply
    545.27x = 817.90 × 448.69
  4. Step 4: Simplify right side
    545.27x = 366,986.72
  5. Step 5: Solve for x
    x = 366,986.72/545.27
  6. Step 6: Final answer
    x = 673.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.