Home / 2,158.14-2,976.85-1,318.38

Finding the Fourth Proportional to 2,158.14, 2,976.85 and 1,318.38

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Solution

The fourth proportional to 2,158.14, 2,976.85 and 1,318.38 is: 1,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.14 : 2,976.85 = 1,318.38 : x
  2. Step 2: Convert to fraction form
    2,158.14/2,976.85 = 1,318.38/x
  3. Step 3: Cross multiply
    2,158.14x = 2,976.85 × 1,318.38
  4. Step 4: Simplify right side
    2,158.14x = 3,924,609.99
  5. Step 5: Solve for x
    x = 3,924,609.99/2,158.14
  6. Step 6: Final answer
    x = 1,818.51

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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.