Home / 2,312.18-3,191.19-2,171.60

Finding the Fourth Proportional to 2,312.18, 3,191.19 and 2,171.60

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Solution

The fourth proportional to 2,312.18, 3,191.19 and 2,171.60 is: 2,997.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.18 : 3,191.19 = 2,171.60 : x
  2. Step 2: Convert to fraction form
    2,312.18/3,191.19 = 2,171.60/x
  3. Step 3: Cross multiply
    2,312.18x = 3,191.19 × 2,171.60
  4. Step 4: Simplify right side
    2,312.18x = 6,929,988.20
  5. Step 5: Solve for x
    x = 6,929,988.20/2,312.18
  6. Step 6: Final answer
    x = 2,997.17

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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.