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Finding the Fourth Proportional to 2,871.16, 3,962.11 and 1,612.21

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Solution

The fourth proportional to 2,871.16, 3,962.11 and 1,612.21 is: 2,224.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,871.16 : 3,962.11 = 1,612.21 : x
  2. Step 2: Convert to fraction form
    2,871.16/3,962.11 = 1,612.21/x
  3. Step 3: Cross multiply
    2,871.16x = 3,962.11 × 1,612.21
  4. Step 4: Simplify right side
    2,871.16x = 6,387,753.36
  5. Step 5: Solve for x
    x = 6,387,753.36/2,871.16
  6. Step 6: Final answer
    x = 2,224.80

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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.