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Finding the Fourth Proportional to 291.05, 436.13 and 245.49

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Solution

The fourth proportional to 291.05, 436.13 and 245.49 is: 367.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.05 : 436.13 = 245.49 : x
  2. Step 2: Convert to fraction form
    291.05/436.13 = 245.49/x
  3. Step 3: Cross multiply
    291.05x = 436.13 × 245.49
  4. Step 4: Simplify right side
    291.05x = 107,065.55
  5. Step 5: Solve for x
    x = 107,065.55/291.05
  6. Step 6: Final answer
    x = 367.86

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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.