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Finding the Fourth Proportional to 1,281.88, 1,924.68 and 793.44

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Solution

The fourth proportional to 1,281.88, 1,924.68 and 793.44 is: 1,191.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.88 : 1,924.68 = 793.44 : x
  2. Step 2: Convert to fraction form
    1,281.88/1,924.68 = 793.44/x
  3. Step 3: Cross multiply
    1,281.88x = 1,924.68 × 793.44
  4. Step 4: Simplify right side
    1,281.88x = 1,527,118.10
  5. Step 5: Solve for x
    x = 1,527,118.10/1,281.88
  6. Step 6: Final answer
    x = 1,191.31

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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.