Home / 1,422.01-2,134.23-691.80

Finding the Fourth Proportional to 1,422.01, 2,134.23 and 691.80

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Solution

The fourth proportional to 1,422.01, 2,134.23 and 691.80 is: 1,038.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.01 : 2,134.23 = 691.80 : x
  2. Step 2: Convert to fraction form
    1,422.01/2,134.23 = 691.80/x
  3. Step 3: Cross multiply
    1,422.01x = 2,134.23 × 691.80
  4. Step 4: Simplify right side
    1,422.01x = 1,476,460.31
  5. Step 5: Solve for x
    x = 1,476,460.31/1,422.01
  6. Step 6: Final answer
    x = 1,038.29

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1.5x scale

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.