Home / 2,312.90-3,191.77-1,318.05

Finding the Fourth Proportional to 2,312.90, 3,191.77 and 1,318.05

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Solution

The fourth proportional to 2,312.90, 3,191.77 and 1,318.05 is: 1,818.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.90 : 3,191.77 = 1,318.05 : x
  2. Step 2: Convert to fraction form
    2,312.90/3,191.77 = 1,318.05/x
  3. Step 3: Cross multiply
    2,312.90x = 3,191.77 × 1,318.05
  4. Step 4: Simplify right side
    2,312.90x = 4,206,899.56
  5. Step 5: Solve for x
    x = 4,206,899.56/2,312.90
  6. Step 6: Final answer
    x = 1,818.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.