Home / 3,518.40-5,279.68-1,298.80

Finding the Fourth Proportional to 3,518.40, 5,279.68 and 1,298.80

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Solution

The fourth proportional to 3,518.40, 5,279.68 and 1,298.80 is: 1,948.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.40 : 5,279.68 = 1,298.80 : x
  2. Step 2: Convert to fraction form
    3,518.40/5,279.68 = 1,298.80/x
  3. Step 3: Cross multiply
    3,518.40x = 5,279.68 × 1,298.80
  4. Step 4: Simplify right side
    3,518.40x = 6,857,248.38
  5. Step 5: Solve for x
    x = 6,857,248.38/3,518.40
  6. Step 6: Final answer
    x = 1,948.97

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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.