Home / 3,423.70-5,123.40-2,378.80

Finding the Fourth Proportional to 3,423.70, 5,123.40 and 2,378.80

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Solution

The fourth proportional to 3,423.70, 5,123.40 and 2,378.80 is: 3,559.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,423.70 : 5,123.40 = 2,378.80 : x
  2. Step 2: Convert to fraction form
    3,423.70/5,123.40 = 2,378.80/x
  3. Step 3: Cross multiply
    3,423.70x = 5,123.40 × 2,378.80
  4. Step 4: Simplify right side
    3,423.70x = 12,187,543.92
  5. Step 5: Solve for x
    x = 12,187,543.92/3,423.70
  6. Step 6: Final answer
    x = 3,559.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.