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Finding the Fourth Proportional to 1,895, 2,615.19 and 1,108.90

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Solution

The fourth proportional to 1,895, 2,615.19 and 1,108.90 is: 1,530.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,895 : 2,615.19 = 1,108.90 : x
  2. Step 2: Convert to fraction form
    1,895/2,615.19 = 1,108.90/x
  3. Step 3: Cross multiply
    1,895x = 2,615.19 × 1,108.90
  4. Step 4: Simplify right side
    1,895x = 2,899,971.12
  5. Step 5: Solve for x
    x = 2,899,971.12/1,895
  6. Step 6: Final answer
    x = 1,530.33

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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.