Home / 1,387.26-1,910.79-1,052.46

Finding the Fourth Proportional to 1,387.26, 1,910.79 and 1,052.46

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Solution

The fourth proportional to 1,387.26, 1,910.79 and 1,052.46 is: 1,449.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.26 : 1,910.79 = 1,052.46 : x
  2. Step 2: Convert to fraction form
    1,387.26/1,910.79 = 1,052.46/x
  3. Step 3: Cross multiply
    1,387.26x = 1,910.79 × 1,052.46
  4. Step 4: Simplify right side
    1,387.26x = 2,011,030.04
  5. Step 5: Solve for x
    x = 2,011,030.04/1,387.26
  6. Step 6: Final answer
    x = 1,449.64

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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.