Home / 3,140.19-4,711-1,385.69

Finding the Fourth Proportional to 3,140.19, 4,711 and 1,385.69

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Solution

The fourth proportional to 3,140.19, 4,711 and 1,385.69 is: 2,078.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.19 : 4,711 = 1,385.69 : x
  2. Step 2: Convert to fraction form
    3,140.19/4,711 = 1,385.69/x
  3. Step 3: Cross multiply
    3,140.19x = 4,711 × 1,385.69
  4. Step 4: Simplify right side
    3,140.19x = 6,527,985.59
  5. Step 5: Solve for x
    x = 6,527,985.59/3,140.19
  6. Step 6: Final answer
    x = 2,078.85

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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.