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Finding the Fourth Proportional to 265.20, 395.72 and 263.68

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Solution

The fourth proportional to 265.20, 395.72 and 263.68 is: 393.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.20 : 395.72 = 263.68 : x
  2. Step 2: Convert to fraction form
    265.20/395.72 = 263.68/x
  3. Step 3: Cross multiply
    265.20x = 395.72 × 263.68
  4. Step 4: Simplify right side
    265.20x = 104,343.45
  5. Step 5: Solve for x
    x = 104,343.45/265.20
  6. Step 6: Final answer
    x = 393.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.