Home / 2,135.28-2,948.06-1,380.43

Finding the Fourth Proportional to 2,135.28, 2,948.06 and 1,380.43

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Solution

The fourth proportional to 2,135.28, 2,948.06 and 1,380.43 is: 1,905.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.28 : 2,948.06 = 1,380.43 : x
  2. Step 2: Convert to fraction form
    2,135.28/2,948.06 = 1,380.43/x
  3. Step 3: Cross multiply
    2,135.28x = 2,948.06 × 1,380.43
  4. Step 4: Simplify right side
    2,135.28x = 4,069,590.47
  5. Step 5: Solve for x
    x = 4,069,590.47/2,135.28
  6. Step 6: Final answer
    x = 1,905.88

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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.