Home / 1,449.28-2,001.15-1,338.72

Finding the Fourth Proportional to 1,449.28, 2,001.15 and 1,338.72

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Solution

The fourth proportional to 1,449.28, 2,001.15 and 1,338.72 is: 1,848.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.28 : 2,001.15 = 1,338.72 : x
  2. Step 2: Convert to fraction form
    1,449.28/2,001.15 = 1,338.72/x
  3. Step 3: Cross multiply
    1,449.28x = 2,001.15 × 1,338.72
  4. Step 4: Simplify right side
    1,449.28x = 2,678,979.53
  5. Step 5: Solve for x
    x = 2,678,979.53/1,449.28
  6. Step 6: Final answer
    x = 1,848.49

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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.