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Finding the Fourth Proportional to 291.28, 436.06 and 272.05

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Solution

The fourth proportional to 291.28, 436.06 and 272.05 is: 407.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.28 : 436.06 = 272.05 : x
  2. Step 2: Convert to fraction form
    291.28/436.06 = 272.05/x
  3. Step 3: Cross multiply
    291.28x = 436.06 × 272.05
  4. Step 4: Simplify right side
    291.28x = 118,630.12
  5. Step 5: Solve for x
    x = 118,630.12/291.28
  6. Step 6: Final answer
    x = 407.27

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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.