Home / 1,219.12-1,681.72-1,079.26

Finding the Fourth Proportional to 1,219.12, 1,681.72 and 1,079.26

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Solution

The fourth proportional to 1,219.12, 1,681.72 and 1,079.26 is: 1,488.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.12 : 1,681.72 = 1,079.26 : x
  2. Step 2: Convert to fraction form
    1,219.12/1,681.72 = 1,079.26/x
  3. Step 3: Cross multiply
    1,219.12x = 1,681.72 × 1,079.26
  4. Step 4: Simplify right side
    1,219.12x = 1,815,006.22
  5. Step 5: Solve for x
    x = 1,815,006.22/1,219.12
  6. Step 6: Final answer
    x = 1,488.79

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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.