Home / 1,421.55-2,132.33-1,251.45

Finding the Fourth Proportional to 1,421.55, 2,132.33 and 1,251.45

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Solution

The fourth proportional to 1,421.55, 2,132.33 and 1,251.45 is: 1,877.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.55 : 2,132.33 = 1,251.45 : x
  2. Step 2: Convert to fraction form
    1,421.55/2,132.33 = 1,251.45/x
  3. Step 3: Cross multiply
    1,421.55x = 2,132.33 × 1,251.45
  4. Step 4: Simplify right side
    1,421.55x = 2,668,498.12
  5. Step 5: Solve for x
    x = 2,668,498.12/1,421.55
  6. Step 6: Final answer
    x = 1,877.18

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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.