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Finding the Fourth Proportional to 1,654.64, 2,479.83 and 874.61

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Solution

The fourth proportional to 1,654.64, 2,479.83 and 874.61 is: 1,310.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,654.64 : 2,479.83 = 874.61 : x
  2. Step 2: Convert to fraction form
    1,654.64/2,479.83 = 874.61/x
  3. Step 3: Cross multiply
    1,654.64x = 2,479.83 × 874.61
  4. Step 4: Simplify right side
    1,654.64x = 2,168,884.12
  5. Step 5: Solve for x
    x = 2,168,884.12/1,654.64
  6. Step 6: Final answer
    x = 1,310.79

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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.