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Finding the Fourth Proportional to 291.93, 402.95 and 186.98

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Solution

The fourth proportional to 291.93, 402.95 and 186.98 is: 258.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.93 : 402.95 = 186.98 : x
  2. Step 2: Convert to fraction form
    291.93/402.95 = 186.98/x
  3. Step 3: Cross multiply
    291.93x = 402.95 × 186.98
  4. Step 4: Simplify right side
    291.93x = 75,343.59
  5. Step 5: Solve for x
    x = 75,343.59/291.93
  6. Step 6: Final answer
    x = 258.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.