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Finding the Fourth Proportional to 743.88, 1,115.84 and 230.88

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Solution

The fourth proportional to 743.88, 1,115.84 and 230.88 is: 346.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.88 : 1,115.84 = 230.88 : x
  2. Step 2: Convert to fraction form
    743.88/1,115.84 = 230.88/x
  3. Step 3: Cross multiply
    743.88x = 1,115.84 × 230.88
  4. Step 4: Simplify right side
    743.88x = 257,625.14
  5. Step 5: Solve for x
    x = 257,625.14/743.88
  6. Step 6: Final answer
    x = 346.33

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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.