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Finding the Fourth Proportional to 1,920.88, 2,881.38 and 1,098.77

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Solution

The fourth proportional to 1,920.88, 2,881.38 and 1,098.77 is: 1,648.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.88 : 2,881.38 = 1,098.77 : x
  2. Step 2: Convert to fraction form
    1,920.88/2,881.38 = 1,098.77/x
  3. Step 3: Cross multiply
    1,920.88x = 2,881.38 × 1,098.77
  4. Step 4: Simplify right side
    1,920.88x = 3,165,973.90
  5. Step 5: Solve for x
    x = 3,165,973.90/1,920.88
  6. Step 6: Final answer
    x = 1,648.19

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1.5x scale

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.