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Finding the Fourth Proportional to 402.77, 555.45 and 271.55

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Solution

The fourth proportional to 402.77, 555.45 and 271.55 is: 374.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.77 : 555.45 = 271.55 : x
  2. Step 2: Convert to fraction form
    402.77/555.45 = 271.55/x
  3. Step 3: Cross multiply
    402.77x = 555.45 × 271.55
  4. Step 4: Simplify right side
    402.77x = 150,832.45
  5. Step 5: Solve for x
    x = 150,832.45/402.77
  6. Step 6: Final answer
    x = 374.49

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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.