Home / 3,220.68-4,440.78-2,987.40

Finding the Fourth Proportional to 3,220.68, 4,440.78 and 2,987.40

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Solution

The fourth proportional to 3,220.68, 4,440.78 and 2,987.40 is: 4,119.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220.68 : 4,440.78 = 2,987.40 : x
  2. Step 2: Convert to fraction form
    3,220.68/4,440.78 = 2,987.40/x
  3. Step 3: Cross multiply
    3,220.68x = 4,440.78 × 2,987.40
  4. Step 4: Simplify right side
    3,220.68x = 13,266,386.17
  5. Step 5: Solve for x
    x = 13,266,386.17/3,220.68
  6. Step 6: Final answer
    x = 4,119.13

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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.