Home / 3,421.20-5,123.70-2,319.60

Finding the Fourth Proportional to 3,421.20, 5,123.70 and 2,319.60

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Solution

The fourth proportional to 3,421.20, 5,123.70 and 2,319.60 is: 3,473.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.20 : 5,123.70 = 2,319.60 : x
  2. Step 2: Convert to fraction form
    3,421.20/5,123.70 = 2,319.60/x
  3. Step 3: Cross multiply
    3,421.20x = 5,123.70 × 2,319.60
  4. Step 4: Simplify right side
    3,421.20x = 11,884,934.52
  5. Step 5: Solve for x
    x = 11,884,934.52/3,421.20
  6. Step 6: Final answer
    x = 3,473.91

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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.