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Finding the Fourth Proportional to 549.76, 759.06 and 402.60

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Solution

The fourth proportional to 549.76, 759.06 and 402.60 is: 555.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.76 : 759.06 = 402.60 : x
  2. Step 2: Convert to fraction form
    549.76/759.06 = 402.60/x
  3. Step 3: Cross multiply
    549.76x = 759.06 × 402.60
  4. Step 4: Simplify right side
    549.76x = 305,597.56
  5. Step 5: Solve for x
    x = 305,597.56/549.76
  6. Step 6: Final answer
    x = 555.87

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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.