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Finding the Fourth Proportional to 264, 395.12 and 260.40

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Solution

The fourth proportional to 264, 395.12 and 260.40 is: 389.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    264 : 395.12 = 260.40 : x
  2. Step 2: Convert to fraction form
    264/395.12 = 260.40/x
  3. Step 3: Cross multiply
    264x = 395.12 × 260.40
  4. Step 4: Simplify right side
    264x = 102,889.25
  5. Step 5: Solve for x
    x = 102,889.25/264
  6. Step 6: Final answer
    x = 389.73

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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.