Home / 1,443.12-2,153.45-1,279.09

Finding the Fourth Proportional to 1,443.12, 2,153.45 and 1,279.09

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Solution

The fourth proportional to 1,443.12, 2,153.45 and 1,279.09 is: 1,908.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443.12 : 2,153.45 = 1,279.09 : x
  2. Step 2: Convert to fraction form
    1,443.12/2,153.45 = 1,279.09/x
  3. Step 3: Cross multiply
    1,443.12x = 2,153.45 × 1,279.09
  4. Step 4: Simplify right side
    1,443.12x = 2,754,456.36
  5. Step 5: Solve for x
    x = 2,754,456.36/1,443.12
  6. Step 6: Final answer
    x = 1,908.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.