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Finding the Fourth Proportional to 549.40, 757.20 and 528.88

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Solution

The fourth proportional to 549.40, 757.20 and 528.88 is: 728.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.40 : 757.20 = 528.88 : x
  2. Step 2: Convert to fraction form
    549.40/757.20 = 528.88/x
  3. Step 3: Cross multiply
    549.40x = 757.20 × 528.88
  4. Step 4: Simplify right side
    549.40x = 400,467.94
  5. Step 5: Solve for x
    x = 400,467.94/549.40
  6. Step 6: Final answer
    x = 728.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.