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Finding the Fourth Proportional to 3,107.49, 4,661.97 and 916.14

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Solution

The fourth proportional to 3,107.49, 4,661.97 and 916.14 is: 1,374.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.49 : 4,661.97 = 916.14 : x
  2. Step 2: Convert to fraction form
    3,107.49/4,661.97 = 916.14/x
  3. Step 3: Cross multiply
    3,107.49x = 4,661.97 × 916.14
  4. Step 4: Simplify right side
    3,107.49x = 4,271,017.20
  5. Step 5: Solve for x
    x = 4,271,017.20/3,107.49
  6. Step 6: Final answer
    x = 1,374.43

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1.5x scale

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.