Home / 1,920.49-2,877.68-1,398.09

Finding the Fourth Proportional to 1,920.49, 2,877.68 and 1,398.09

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Solution

The fourth proportional to 1,920.49, 2,877.68 and 1,398.09 is: 2,094.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.49 : 2,877.68 = 1,398.09 : x
  2. Step 2: Convert to fraction form
    1,920.49/2,877.68 = 1,398.09/x
  3. Step 3: Cross multiply
    1,920.49x = 2,877.68 × 1,398.09
  4. Step 4: Simplify right side
    1,920.49x = 4,023,269.92
  5. Step 5: Solve for x
    x = 4,023,269.92/1,920.49
  6. Step 6: Final answer
    x = 2,094.92

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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.