Home / 1,422.13-2,134.14-988.51

Finding the Fourth Proportional to 1,422.13, 2,134.14 and 988.51

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Solution

The fourth proportional to 1,422.13, 2,134.14 and 988.51 is: 1,483.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.13 : 2,134.14 = 988.51 : x
  2. Step 2: Convert to fraction form
    1,422.13/2,134.14 = 988.51/x
  3. Step 3: Cross multiply
    1,422.13x = 2,134.14 × 988.51
  4. Step 4: Simplify right side
    1,422.13x = 2,109,618.73
  5. Step 5: Solve for x
    x = 2,109,618.73/1,422.13
  6. Step 6: Final answer
    x = 1,483.42

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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.