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Finding the Fourth Proportional to 547.72, 759.60 and 528.28

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Solution

The fourth proportional to 547.72, 759.60 and 528.28 is: 732.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.72 : 759.60 = 528.28 : x
  2. Step 2: Convert to fraction form
    547.72/759.60 = 528.28/x
  3. Step 3: Cross multiply
    547.72x = 759.60 × 528.28
  4. Step 4: Simplify right side
    547.72x = 401,281.49
  5. Step 5: Solve for x
    x = 401,281.49/547.72
  6. Step 6: Final answer
    x = 732.64

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.