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Finding the Fourth Proportional to 1,909.15, 2,864.12 and 676.63

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Solution

The fourth proportional to 1,909.15, 2,864.12 and 676.63 is: 1,015.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.15 : 2,864.12 = 676.63 : x
  2. Step 2: Convert to fraction form
    1,909.15/2,864.12 = 676.63/x
  3. Step 3: Cross multiply
    1,909.15x = 2,864.12 × 676.63
  4. Step 4: Simplify right side
    1,909.15x = 1,937,949.52
  5. Step 5: Solve for x
    x = 1,937,949.52/1,909.15
  6. Step 6: Final answer
    x = 1,015.08

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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.