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Finding the Fourth Proportional to 291.93, 402.89 and 274.34

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Solution

The fourth proportional to 291.93, 402.89 and 274.34 is: 378.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.93 : 402.89 = 274.34 : x
  2. Step 2: Convert to fraction form
    291.93/402.89 = 274.34/x
  3. Step 3: Cross multiply
    291.93x = 402.89 × 274.34
  4. Step 4: Simplify right side
    291.93x = 110,525.46
  5. Step 5: Solve for x
    x = 110,525.46/291.93
  6. Step 6: Final answer
    x = 378.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.