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Finding the Fourth Proportional to 3,107.67, 4,659.86 and 916.08

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Solution

The fourth proportional to 3,107.67, 4,659.86 and 916.08 is: 1,373.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.67 : 4,659.86 = 916.08 : x
  2. Step 2: Convert to fraction form
    3,107.67/4,659.86 = 916.08/x
  3. Step 3: Cross multiply
    3,107.67x = 4,659.86 × 916.08
  4. Step 4: Simplify right side
    3,107.67x = 4,268,799.97
  5. Step 5: Solve for x
    x = 4,268,799.97/3,107.67
  6. Step 6: Final answer
    x = 1,373.63

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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.