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Finding the Fourth Proportional to 743.97, 1,114.44 and 348.09

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Solution

The fourth proportional to 743.97, 1,114.44 and 348.09 is: 521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.97 : 1,114.44 = 348.09 : x
  2. Step 2: Convert to fraction form
    743.97/1,114.44 = 348.09/x
  3. Step 3: Cross multiply
    743.97x = 1,114.44 × 348.09
  4. Step 4: Simplify right side
    743.97x = 387,925.42
  5. Step 5: Solve for x
    x = 387,925.42/743.97
  6. Step 6: Final answer
    x = 521.43

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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.