Home / 2,312.38-3,191.16-1,317.88

Finding the Fourth Proportional to 2,312.38, 3,191.16 and 1,317.88

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Solution

The fourth proportional to 2,312.38, 3,191.16 and 1,317.88 is: 1,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.38 : 3,191.16 = 1,317.88 : x
  2. Step 2: Convert to fraction form
    2,312.38/3,191.16 = 1,317.88/x
  3. Step 3: Cross multiply
    2,312.38x = 3,191.16 × 1,317.88
  4. Step 4: Simplify right side
    2,312.38x = 4,205,565.94
  5. Step 5: Solve for x
    x = 4,205,565.94/2,312.38
  6. Step 6: Final answer
    x = 1,818.72

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1.5x scale

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.