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Finding the Fourth Proportional to 291, 435.74 and 247.56

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Solution

The fourth proportional to 291, 435.74 and 247.56 is: 370.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    291 : 435.74 = 247.56 : x
  2. Step 2: Convert to fraction form
    291/435.74 = 247.56/x
  3. Step 3: Cross multiply
    291x = 435.74 × 247.56
  4. Step 4: Simplify right side
    291x = 107,871.79
  5. Step 5: Solve for x
    x = 107,871.79/291
  6. Step 6: Final answer
    x = 370.69

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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.