Home / 1,402.25-2,101.55-1,380.38

Finding the Fourth Proportional to 1,402.25, 2,101.55 and 1,380.38

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Solution

The fourth proportional to 1,402.25, 2,101.55 and 1,380.38 is: 2,068.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.25 : 2,101.55 = 1,380.38 : x
  2. Step 2: Convert to fraction form
    1,402.25/2,101.55 = 1,380.38/x
  3. Step 3: Cross multiply
    1,402.25x = 2,101.55 × 1,380.38
  4. Step 4: Simplify right side
    1,402.25x = 2,900,920.18
  5. Step 5: Solve for x
    x = 2,900,920.18/1,402.25
  6. Step 6: Final answer
    x = 2,068.77

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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.