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Finding the Fourth Proportional to 548.57, 815.81 and 531.27

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Solution

The fourth proportional to 548.57, 815.81 and 531.27 is: 790.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.57 : 815.81 = 531.27 : x
  2. Step 2: Convert to fraction form
    548.57/815.81 = 531.27/x
  3. Step 3: Cross multiply
    548.57x = 815.81 × 531.27
  4. Step 4: Simplify right side
    548.57x = 433,412.72
  5. Step 5: Solve for x
    x = 433,412.72/548.57
  6. Step 6: Final answer
    x = 790.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.