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Finding the Fourth Proportional to 865.60, 1,291.74 and 773.33

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Solution

The fourth proportional to 865.60, 1,291.74 and 773.33 is: 1,154.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.60 : 1,291.74 = 773.33 : x
  2. Step 2: Convert to fraction form
    865.60/1,291.74 = 773.33/x
  3. Step 3: Cross multiply
    865.60x = 1,291.74 × 773.33
  4. Step 4: Simplify right side
    865.60x = 998,941.29
  5. Step 5: Solve for x
    x = 998,941.29/865.60
  6. Step 6: Final answer
    x = 1,154.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.