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Finding the Fourth Proportional to 415.43, 573.54 and 275.74

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Solution

The fourth proportional to 415.43, 573.54 and 275.74 is: 380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.43 : 573.54 = 275.74 : x
  2. Step 2: Convert to fraction form
    415.43/573.54 = 275.74/x
  3. Step 3: Cross multiply
    415.43x = 573.54 × 275.74
  4. Step 4: Simplify right side
    415.43x = 158,146.54
  5. Step 5: Solve for x
    x = 158,146.54/415.43
  6. Step 6: Final answer
    x = 380.68

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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.