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Finding the Fourth Proportional to 291.74, 437.65 and 261.45

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Solution

The fourth proportional to 291.74, 437.65 and 261.45 is: 392.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.74 : 437.65 = 261.45 : x
  2. Step 2: Convert to fraction form
    291.74/437.65 = 261.45/x
  3. Step 3: Cross multiply
    291.74x = 437.65 × 261.45
  4. Step 4: Simplify right side
    291.74x = 114,422.94
  5. Step 5: Solve for x
    x = 114,422.94/291.74
  6. Step 6: Final answer
    x = 392.22

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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.