Home / 1,422.02-2,129.34-1,217.90

Finding the Fourth Proportional to 1,422.02, 2,129.34 and 1,217.90

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Solution

The fourth proportional to 1,422.02, 2,129.34 and 1,217.90 is: 1,823.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.02 : 2,129.34 = 1,217.90 : x
  2. Step 2: Convert to fraction form
    1,422.02/2,129.34 = 1,217.90/x
  3. Step 3: Cross multiply
    1,422.02x = 2,129.34 × 1,217.90
  4. Step 4: Simplify right side
    1,422.02x = 2,593,323.19
  5. Step 5: Solve for x
    x = 2,593,323.19/1,422.02
  6. Step 6: Final answer
    x = 1,823.69

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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.