Home / 1,421.49-2,132.22-680.93

Finding the Fourth Proportional to 1,421.49, 2,132.22 and 680.93

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Solution

The fourth proportional to 1,421.49, 2,132.22 and 680.93 is: 1,021.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.49 : 2,132.22 = 680.93 : x
  2. Step 2: Convert to fraction form
    1,421.49/2,132.22 = 680.93/x
  3. Step 3: Cross multiply
    1,421.49x = 2,132.22 × 680.93
  4. Step 4: Simplify right side
    1,421.49x = 1,451,892.45
  5. Step 5: Solve for x
    x = 1,451,892.45/1,421.49
  6. Step 6: Final answer
    x = 1,021.39

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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.