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Finding the Fourth Proportional to 264.86, 397.12 and 128.01

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Solution

The fourth proportional to 264.86, 397.12 and 128.01 is: 191.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.86 : 397.12 = 128.01 : x
  2. Step 2: Convert to fraction form
    264.86/397.12 = 128.01/x
  3. Step 3: Cross multiply
    264.86x = 397.12 × 128.01
  4. Step 4: Simplify right side
    264.86x = 50,835.33
  5. Step 5: Solve for x
    x = 50,835.33/264.86
  6. Step 6: Final answer
    x = 191.93

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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.