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Finding the Fourth Proportional to 874.29, 1,310.48 and 668.25

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Solution

The fourth proportional to 874.29, 1,310.48 and 668.25 is: 1,001.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.29 : 1,310.48 = 668.25 : x
  2. Step 2: Convert to fraction form
    874.29/1,310.48 = 668.25/x
  3. Step 3: Cross multiply
    874.29x = 1,310.48 × 668.25
  4. Step 4: Simplify right side
    874.29x = 875,727.42
  5. Step 5: Solve for x
    x = 875,727.42/874.29
  6. Step 6: Final answer
    x = 1,001.64

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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.