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Finding the Fourth Proportional to 791.04, 1,089.14 and 672.76

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Solution

The fourth proportional to 791.04, 1,089.14 and 672.76 is: 926.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.04 : 1,089.14 = 672.76 : x
  2. Step 2: Convert to fraction form
    791.04/1,089.14 = 672.76/x
  3. Step 3: Cross multiply
    791.04x = 1,089.14 × 672.76
  4. Step 4: Simplify right side
    791.04x = 732,729.83
  5. Step 5: Solve for x
    x = 732,729.83/791.04
  6. Step 6: Final answer
    x = 926.29

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Double scale
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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.