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Finding the Fourth Proportional to 345.83, 517.85 and 191.58

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Solution

The fourth proportional to 345.83, 517.85 and 191.58 is: 286.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.83 : 517.85 = 191.58 : x
  2. Step 2: Convert to fraction form
    345.83/517.85 = 191.58/x
  3. Step 3: Cross multiply
    345.83x = 517.85 × 191.58
  4. Step 4: Simplify right side
    345.83x = 99,209.70
  5. Step 5: Solve for x
    x = 99,209.70/345.83
  6. Step 6: Final answer
    x = 286.87

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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.