Home / 3,988.60-5,983.77-1,215.20

Finding the Fourth Proportional to 3,988.60, 5,983.77 and 1,215.20

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Solution

The fourth proportional to 3,988.60, 5,983.77 and 1,215.20 is: 1,823.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.60 : 5,983.77 = 1,215.20 : x
  2. Step 2: Convert to fraction form
    3,988.60/5,983.77 = 1,215.20/x
  3. Step 3: Cross multiply
    3,988.60x = 5,983.77 × 1,215.20
  4. Step 4: Simplify right side
    3,988.60x = 7,271,489.98
  5. Step 5: Solve for x
    x = 7,271,489.98/3,988.60
  6. Step 6: Final answer
    x = 1,823.07

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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.