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Finding the Fourth Proportional to 415.19, 572.81 and 275.33

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Solution

The fourth proportional to 415.19, 572.81 and 275.33 is: 379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.19 : 572.81 = 275.33 : x
  2. Step 2: Convert to fraction form
    415.19/572.81 = 275.33/x
  3. Step 3: Cross multiply
    415.19x = 572.81 × 275.33
  4. Step 4: Simplify right side
    415.19x = 157,711.83
  5. Step 5: Solve for x
    x = 157,711.83/415.19
  6. Step 6: Final answer
    x = 379.85

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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.