Home / 3,987.79-5,503.41-2,219.40

Finding the Fourth Proportional to 3,987.79, 5,503.41 and 2,219.40

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Solution

The fourth proportional to 3,987.79, 5,503.41 and 2,219.40 is: 3,062.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.79 : 5,503.41 = 2,219.40 : x
  2. Step 2: Convert to fraction form
    3,987.79/5,503.41 = 2,219.40/x
  3. Step 3: Cross multiply
    3,987.79x = 5,503.41 × 2,219.40
  4. Step 4: Simplify right side
    3,987.79x = 12,214,268.15
  5. Step 5: Solve for x
    x = 12,214,268.15/3,987.79
  6. Step 6: Final answer
    x = 3,062.92

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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.