Home / 1,918.96-2,648.10-1,079.68

Finding the Fourth Proportional to 1,918.96, 2,648.10 and 1,079.68

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Solution

The fourth proportional to 1,918.96, 2,648.10 and 1,079.68 is: 1,489.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.96 : 2,648.10 = 1,079.68 : x
  2. Step 2: Convert to fraction form
    1,918.96/2,648.10 = 1,079.68/x
  3. Step 3: Cross multiply
    1,918.96x = 2,648.10 × 1,079.68
  4. Step 4: Simplify right side
    1,918.96x = 2,859,100.61
  5. Step 5: Solve for x
    x = 2,859,100.61/1,918.96
  6. Step 6: Final answer
    x = 1,489.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.