Home / 1,979.61-2,962.80-1,422.87

Finding the Fourth Proportional to 1,979.61, 2,962.80 and 1,422.87

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Solution

The fourth proportional to 1,979.61, 2,962.80 and 1,422.87 is: 2,129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.61 : 2,962.80 = 1,422.87 : x
  2. Step 2: Convert to fraction form
    1,979.61/2,962.80 = 1,422.87/x
  3. Step 3: Cross multiply
    1,979.61x = 2,962.80 × 1,422.87
  4. Step 4: Simplify right side
    1,979.61x = 4,215,679.24
  5. Step 5: Solve for x
    x = 4,215,679.24/1,979.61
  6. Step 6: Final answer
    x = 2,129.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.