Home / 2,488.60-3,729.30-2,121.40

Finding the Fourth Proportional to 2,488.60, 3,729.30 and 2,121.40

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Solution

The fourth proportional to 2,488.60, 3,729.30 and 2,121.40 is: 3,179.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,488.60 : 3,729.30 = 2,121.40 : x
  2. Step 2: Convert to fraction form
    2,488.60/3,729.30 = 2,121.40/x
  3. Step 3: Cross multiply
    2,488.60x = 3,729.30 × 2,121.40
  4. Step 4: Simplify right side
    2,488.60x = 7,911,337.02
  5. Step 5: Solve for x
    x = 7,911,337.02/2,488.60
  6. Step 6: Final answer
    x = 3,179.03

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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.