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Finding the Fourth Proportional to 900.91, 1,243.28 and 527.92

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Solution

The fourth proportional to 900.91, 1,243.28 and 527.92 is: 728.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.91 : 1,243.28 = 527.92 : x
  2. Step 2: Convert to fraction form
    900.91/1,243.28 = 527.92/x
  3. Step 3: Cross multiply
    900.91x = 1,243.28 × 527.92
  4. Step 4: Simplify right side
    900.91x = 656,352.38
  5. Step 5: Solve for x
    x = 656,352.38/900.91
  6. Step 6: Final answer
    x = 728.55

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1.5x scale

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.