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Finding the Fourth Proportional to 291.81, 436.80 and 248.07

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Solution

The fourth proportional to 291.81, 436.80 and 248.07 is: 371.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.81 : 436.80 = 248.07 : x
  2. Step 2: Convert to fraction form
    291.81/436.80 = 248.07/x
  3. Step 3: Cross multiply
    291.81x = 436.80 × 248.07
  4. Step 4: Simplify right side
    291.81x = 108,356.98
  5. Step 5: Solve for x
    x = 108,356.98/291.81
  6. Step 6: Final answer
    x = 371.33

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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.