Home / 2,312.94-3,191.76-1,318.38

Finding the Fourth Proportional to 2,312.94, 3,191.76 and 1,318.38

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Solution

The fourth proportional to 2,312.94, 3,191.76 and 1,318.38 is: 1,819.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.94 : 3,191.76 = 1,318.38 : x
  2. Step 2: Convert to fraction form
    2,312.94/3,191.76 = 1,318.38/x
  3. Step 3: Cross multiply
    2,312.94x = 3,191.76 × 1,318.38
  4. Step 4: Simplify right side
    2,312.94x = 4,207,952.55
  5. Step 5: Solve for x
    x = 4,207,952.55/2,312.94
  6. Step 6: Final answer
    x = 1,819.31

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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.