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Finding the Fourth Proportional to 407.42, 610.82 and 191.15

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Solution

The fourth proportional to 407.42, 610.82 and 191.15 is: 286.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.42 : 610.82 = 191.15 : x
  2. Step 2: Convert to fraction form
    407.42/610.82 = 191.15/x
  3. Step 3: Cross multiply
    407.42x = 610.82 × 191.15
  4. Step 4: Simplify right side
    407.42x = 116,758.24
  5. Step 5: Solve for x
    x = 116,758.24/407.42
  6. Step 6: Final answer
    x = 286.58

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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.