Home / 2,812.32-4,221.12-1,988.24

Finding the Fourth Proportional to 2,812.32, 4,221.12 and 1,988.24

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Solution

The fourth proportional to 2,812.32, 4,221.12 and 1,988.24 is: 2,984.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.32 : 4,221.12 = 1,988.24 : x
  2. Step 2: Convert to fraction form
    2,812.32/4,221.12 = 1,988.24/x
  3. Step 3: Cross multiply
    2,812.32x = 4,221.12 × 1,988.24
  4. Step 4: Simplify right side
    2,812.32x = 8,392,599.63
  5. Step 5: Solve for x
    x = 8,392,599.63/2,812.32
  6. Step 6: Final answer
    x = 2,984.23

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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.