Home / 3,107.21-4,660.85-916.16

Finding the Fourth Proportional to 3,107.21, 4,660.85 and 916.16

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Solution

The fourth proportional to 3,107.21, 4,660.85 and 916.16 is: 1,374.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.21 : 4,660.85 = 916.16 : x
  2. Step 2: Convert to fraction form
    3,107.21/4,660.85 = 916.16/x
  3. Step 3: Cross multiply
    3,107.21x = 4,660.85 × 916.16
  4. Step 4: Simplify right side
    3,107.21x = 4,270,063.32
  5. Step 5: Solve for x
    x = 4,270,063.32/3,107.21
  6. Step 6: Final answer
    x = 1,374.25

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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.