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Finding the Fourth Proportional to 1,855, 2,559.19 and 1,225.83

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Solution

The fourth proportional to 1,855, 2,559.19 and 1,225.83 is: 1,691.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855 : 2,559.19 = 1,225.83 : x
  2. Step 2: Convert to fraction form
    1,855/2,559.19 = 1,225.83/x
  3. Step 3: Cross multiply
    1,855x = 2,559.19 × 1,225.83
  4. Step 4: Simplify right side
    1,855x = 3,137,131.88
  5. Step 5: Solve for x
    x = 3,137,131.88/1,855
  6. Step 6: Final answer
    x = 1,691.18

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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.