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Finding the Fourth Proportional to 862, 1,290.54 and 731.84

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Solution

The fourth proportional to 862, 1,290.54 and 731.84 is: 1,095.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    862 : 1,290.54 = 731.84 : x
  2. Step 2: Convert to fraction form
    862/1,290.54 = 731.84/x
  3. Step 3: Cross multiply
    862x = 1,290.54 × 731.84
  4. Step 4: Simplify right side
    862x = 944,468.79
  5. Step 5: Solve for x
    x = 944,468.79/862
  6. Step 6: Final answer
    x = 1,095.67

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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.