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Finding the Fourth Proportional to 1,865.90, 2,575.14 and 1,079.90

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Solution

The fourth proportional to 1,865.90, 2,575.14 and 1,079.90 is: 1,490.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.90 : 2,575.14 = 1,079.90 : x
  2. Step 2: Convert to fraction form
    1,865.90/2,575.14 = 1,079.90/x
  3. Step 3: Cross multiply
    1,865.90x = 2,575.14 × 1,079.90
  4. Step 4: Simplify right side
    1,865.90x = 2,780,893.69
  5. Step 5: Solve for x
    x = 2,780,893.69/1,865.90
  6. Step 6: Final answer
    x = 1,490.38

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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.