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Finding the Fourth Proportional to 1,909.42, 2,864.16 and 1,255.47

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Solution

The fourth proportional to 1,909.42, 2,864.16 and 1,255.47 is: 1,883.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.42 : 2,864.16 = 1,255.47 : x
  2. Step 2: Convert to fraction form
    1,909.42/2,864.16 = 1,255.47/x
  3. Step 3: Cross multiply
    1,909.42x = 2,864.16 × 1,255.47
  4. Step 4: Simplify right side
    1,909.42x = 3,595,856.21
  5. Step 5: Solve for x
    x = 3,595,856.21/1,909.42
  6. Step 6: Final answer
    x = 1,883.22

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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.