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Finding the Fourth Proportional to 548.72, 752.74 and 515.60

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Solution

The fourth proportional to 548.72, 752.74 and 515.60 is: 707.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.72 : 752.74 = 515.60 : x
  2. Step 2: Convert to fraction form
    548.72/752.74 = 515.60/x
  3. Step 3: Cross multiply
    548.72x = 752.74 × 515.60
  4. Step 4: Simplify right side
    548.72x = 388,112.74
  5. Step 5: Solve for x
    x = 388,112.74/548.72
  6. Step 6: Final answer
    x = 707.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.