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Finding the Fourth Proportional to 264.34, 396.48 and 91.00

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Solution

The fourth proportional to 264.34, 396.48 and 91.00 is: 136.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.34 : 396.48 = 91.00 : x
  2. Step 2: Convert to fraction form
    264.34/396.48 = 91.00/x
  3. Step 3: Cross multiply
    264.34x = 396.48 × 91.00
  4. Step 4: Simplify right side
    264.34x = 36,078.89
  5. Step 5: Solve for x
    x = 36,078.89/264.34
  6. Step 6: Final answer
    x = 136.49

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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.