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Finding the Fourth Proportional to 791.23, 1,186.98 and 358.39

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Solution

The fourth proportional to 791.23, 1,186.98 and 358.39 is: 537.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.23 : 1,186.98 = 358.39 : x
  2. Step 2: Convert to fraction form
    791.23/1,186.98 = 358.39/x
  3. Step 3: Cross multiply
    791.23x = 1,186.98 × 358.39
  4. Step 4: Simplify right side
    791.23x = 425,401.76
  5. Step 5: Solve for x
    x = 425,401.76/791.23
  6. Step 6: Final answer
    x = 537.65

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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.