Home / 3,988.60-5,982.69-1,215.21

Finding the Fourth Proportional to 3,988.60, 5,982.69 and 1,215.21

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Solution

The fourth proportional to 3,988.60, 5,982.69 and 1,215.21 is: 1,822.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.60 : 5,982.69 = 1,215.21 : x
  2. Step 2: Convert to fraction form
    3,988.60/5,982.69 = 1,215.21/x
  3. Step 3: Cross multiply
    3,988.60x = 5,982.69 × 1,215.21
  4. Step 4: Simplify right side
    3,988.60x = 7,270,224.71
  5. Step 5: Solve for x
    x = 7,270,224.71/3,988.60
  6. Step 6: Final answer
    x = 1,822.75

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1.5x scale

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.