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Finding the Fourth Proportional to 784.26, 1,175.85 and 681.66

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Solution

The fourth proportional to 784.26, 1,175.85 and 681.66 is: 1,022.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.26 : 1,175.85 = 681.66 : x
  2. Step 2: Convert to fraction form
    784.26/1,175.85 = 681.66/x
  3. Step 3: Cross multiply
    784.26x = 1,175.85 × 681.66
  4. Step 4: Simplify right side
    784.26x = 801,529.91
  5. Step 5: Solve for x
    x = 801,529.91/784.26
  6. Step 6: Final answer
    x = 1,022.02

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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.