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Finding the Fourth Proportional to 843.56, 1,264.08 and 611.88

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Solution

The fourth proportional to 843.56, 1,264.08 and 611.88 is: 916.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.56 : 1,264.08 = 611.88 : x
  2. Step 2: Convert to fraction form
    843.56/1,264.08 = 611.88/x
  3. Step 3: Cross multiply
    843.56x = 1,264.08 × 611.88
  4. Step 4: Simplify right side
    843.56x = 773,465.27
  5. Step 5: Solve for x
    x = 773,465.27/843.56
  6. Step 6: Final answer
    x = 916.91

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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.