Home / 2,486.60-3,731.88-1,390.76

Finding the Fourth Proportional to 2,486.60, 3,731.88 and 1,390.76

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Solution

The fourth proportional to 2,486.60, 3,731.88 and 1,390.76 is: 2,087.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.60 : 3,731.88 = 1,390.76 : x
  2. Step 2: Convert to fraction form
    2,486.60/3,731.88 = 1,390.76/x
  3. Step 3: Cross multiply
    2,486.60x = 3,731.88 × 1,390.76
  4. Step 4: Simplify right side
    2,486.60x = 5,190,149.43
  5. Step 5: Solve for x
    x = 5,190,149.43/2,486.60
  6. Step 6: Final answer
    x = 2,087.25

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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.