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Finding the Fourth Proportional to 3,107.99, 4,660.36 and 916.43

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Solution

The fourth proportional to 3,107.99, 4,660.36 and 916.43 is: 1,374.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.99 : 4,660.36 = 916.43 : x
  2. Step 2: Convert to fraction form
    3,107.99/4,660.36 = 916.43/x
  3. Step 3: Cross multiply
    3,107.99x = 4,660.36 × 916.43
  4. Step 4: Simplify right side
    3,107.99x = 4,270,868.12
  5. Step 5: Solve for x
    x = 4,270,868.12/3,107.99
  6. Step 6: Final answer
    x = 1,374.16

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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.