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Finding the Fourth Proportional to 920.44, 1,270.22 and 527.48

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Solution

The fourth proportional to 920.44, 1,270.22 and 527.48 is: 727.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.44 : 1,270.22 = 527.48 : x
  2. Step 2: Convert to fraction form
    920.44/1,270.22 = 527.48/x
  3. Step 3: Cross multiply
    920.44x = 1,270.22 × 527.48
  4. Step 4: Simplify right side
    920.44x = 670,006.66
  5. Step 5: Solve for x
    x = 670,006.66/920.44
  6. Step 6: Final answer
    x = 727.92

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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.