Home / 3,141.30-4,711.85-1,385.76

Finding the Fourth Proportional to 3,141.30, 4,711.85 and 1,385.76

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Solution

The fourth proportional to 3,141.30, 4,711.85 and 1,385.76 is: 2,078.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,141.30 : 4,711.85 = 1,385.76 : x
  2. Step 2: Convert to fraction form
    3,141.30/4,711.85 = 1,385.76/x
  3. Step 3: Cross multiply
    3,141.30x = 4,711.85 × 1,385.76
  4. Step 4: Simplify right side
    3,141.30x = 6,529,493.26
  5. Step 5: Solve for x
    x = 6,529,493.26/3,141.30
  6. Step 6: Final answer
    x = 2,078.60

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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.