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Finding the Fourth Proportional to 291.91, 437.51 and 137.63

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Solution

The fourth proportional to 291.91, 437.51 and 137.63 is: 206.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.91 : 437.51 = 137.63 : x
  2. Step 2: Convert to fraction form
    291.91/437.51 = 137.63/x
  3. Step 3: Cross multiply
    291.91x = 437.51 × 137.63
  4. Step 4: Simplify right side
    291.91x = 60,213.81
  5. Step 5: Solve for x
    x = 60,213.81/291.91
  6. Step 6: Final answer
    x = 206.28

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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.