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Finding the Fourth Proportional to 859.11, 1,185.47 and 527.48

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Solution

The fourth proportional to 859.11, 1,185.47 and 527.48 is: 727.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.11 : 1,185.47 = 527.48 : x
  2. Step 2: Convert to fraction form
    859.11/1,185.47 = 527.48/x
  3. Step 3: Cross multiply
    859.11x = 1,185.47 × 527.48
  4. Step 4: Simplify right side
    859.11x = 625,309.57
  5. Step 5: Solve for x
    x = 625,309.57/859.11
  6. Step 6: Final answer
    x = 727.86

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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.