Home / 1,643.32-2,266.98-979.96

Finding the Fourth Proportional to 1,643.32, 2,266.98 and 979.96

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Solution

The fourth proportional to 1,643.32, 2,266.98 and 979.96 is: 1,351.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.32 : 2,266.98 = 979.96 : x
  2. Step 2: Convert to fraction form
    1,643.32/2,266.98 = 979.96/x
  3. Step 3: Cross multiply
    1,643.32x = 2,266.98 × 979.96
  4. Step 4: Simplify right side
    1,643.32x = 2,221,549.72
  5. Step 5: Solve for x
    x = 2,221,549.72/1,643.32
  6. Step 6: Final answer
    x = 1,351.87

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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.