Home / 3,078.60-4,248.28-1,899.76

Finding the Fourth Proportional to 3,078.60, 4,248.28 and 1,899.76

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Solution

The fourth proportional to 3,078.60, 4,248.28 and 1,899.76 is: 2,621.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.60 : 4,248.28 = 1,899.76 : x
  2. Step 2: Convert to fraction form
    3,078.60/4,248.28 = 1,899.76/x
  3. Step 3: Cross multiply
    3,078.60x = 4,248.28 × 1,899.76
  4. Step 4: Simplify right side
    3,078.60x = 8,070,712.41
  5. Step 5: Solve for x
    x = 8,070,712.41/3,078.60
  6. Step 6: Final answer
    x = 2,621.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.