Home / 1,622.12-2,240.10-1,387.88

Finding the Fourth Proportional to 1,622.12, 2,240.10 and 1,387.88

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Solution

The fourth proportional to 1,622.12, 2,240.10 and 1,387.88 is: 1,916.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,622.12 : 2,240.10 = 1,387.88 : x
  2. Step 2: Convert to fraction form
    1,622.12/2,240.10 = 1,387.88/x
  3. Step 3: Cross multiply
    1,622.12x = 2,240.10 × 1,387.88
  4. Step 4: Simplify right side
    1,622.12x = 3,108,989.99
  5. Step 5: Solve for x
    x = 3,108,989.99/1,622.12
  6. Step 6: Final answer
    x = 1,916.62

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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.