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Finding the Fourth Proportional to 291.47, 436.19 and 181.71

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Solution

The fourth proportional to 291.47, 436.19 and 181.71 is: 271.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.47 : 436.19 = 181.71 : x
  2. Step 2: Convert to fraction form
    291.47/436.19 = 181.71/x
  3. Step 3: Cross multiply
    291.47x = 436.19 × 181.71
  4. Step 4: Simplify right side
    291.47x = 79,259.18
  5. Step 5: Solve for x
    x = 79,259.18/291.47
  6. Step 6: Final answer
    x = 271.93

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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.