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Finding the Fourth Proportional to 291.33, 436.79 and 135.07

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Solution

The fourth proportional to 291.33, 436.79 and 135.07 is: 202.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.33 : 436.79 = 135.07 : x
  2. Step 2: Convert to fraction form
    291.33/436.79 = 135.07/x
  3. Step 3: Cross multiply
    291.33x = 436.79 × 135.07
  4. Step 4: Simplify right side
    291.33x = 58,996.47
  5. Step 5: Solve for x
    x = 58,996.47/291.33
  6. Step 6: Final answer
    x = 202.51

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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.