Home / 3,988.28-5,502.78-2,219.45

Finding the Fourth Proportional to 3,988.28, 5,502.78 and 2,219.45

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Solution

The fourth proportional to 3,988.28, 5,502.78 and 2,219.45 is: 3,062.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.28 : 5,502.78 = 2,219.45 : x
  2. Step 2: Convert to fraction form
    3,988.28/5,502.78 = 2,219.45/x
  3. Step 3: Cross multiply
    3,988.28x = 5,502.78 × 2,219.45
  4. Step 4: Simplify right side
    3,988.28x = 12,213,145.07
  5. Step 5: Solve for x
    x = 12,213,145.07/3,988.28
  6. Step 6: Final answer
    x = 3,062.26

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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.