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Finding the Fourth Proportional to 1,062.61, 1,591.85 and 843.64

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Solution

The fourth proportional to 1,062.61, 1,591.85 and 843.64 is: 1,263.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,062.61 : 1,591.85 = 843.64 : x
  2. Step 2: Convert to fraction form
    1,062.61/1,591.85 = 843.64/x
  3. Step 3: Cross multiply
    1,062.61x = 1,591.85 × 843.64
  4. Step 4: Simplify right side
    1,062.61x = 1,342,936.16
  5. Step 5: Solve for x
    x = 1,342,936.16/1,062.61
  6. Step 6: Final answer
    x = 1,263.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.