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Finding the Fourth Proportional to 1,855.47, 2,781.18 and 1,124.85

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Solution

The fourth proportional to 1,855.47, 2,781.18 and 1,124.85 is: 1,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.47 : 2,781.18 = 1,124.85 : x
  2. Step 2: Convert to fraction form
    1,855.47/2,781.18 = 1,124.85/x
  3. Step 3: Cross multiply
    1,855.47x = 2,781.18 × 1,124.85
  4. Step 4: Simplify right side
    1,855.47x = 3,128,410.32
  5. Step 5: Solve for x
    x = 3,128,410.32/1,855.47
  6. Step 6: Final answer
    x = 1,686.05

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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.