Home / 2,123.11-2,929.84-1,178.90

Finding the Fourth Proportional to 2,123.11, 2,929.84 and 1,178.90

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Solution

The fourth proportional to 2,123.11, 2,929.84 and 1,178.90 is: 1,626.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.11 : 2,929.84 = 1,178.90 : x
  2. Step 2: Convert to fraction form
    2,123.11/2,929.84 = 1,178.90/x
  3. Step 3: Cross multiply
    2,123.11x = 2,929.84 × 1,178.90
  4. Step 4: Simplify right side
    2,123.11x = 3,453,982.48
  5. Step 5: Solve for x
    x = 3,453,982.48/2,123.11
  6. Step 6: Final answer
    x = 1,626.85

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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.