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Finding the Fourth Proportional to 402.59, 555.80 and 276.73

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Solution

The fourth proportional to 402.59, 555.80 and 276.73 is: 382.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.59 : 555.80 = 276.73 : x
  2. Step 2: Convert to fraction form
    402.59/555.80 = 276.73/x
  3. Step 3: Cross multiply
    402.59x = 555.80 × 276.73
  4. Step 4: Simplify right side
    402.59x = 153,806.89
  5. Step 5: Solve for x
    x = 153,806.89/402.59
  6. Step 6: Final answer
    x = 382.05

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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.