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Finding the Fourth Proportional to 265.11, 398.07 and 253.59

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Solution

The fourth proportional to 265.11, 398.07 and 253.59 is: 380.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.11 : 398.07 = 253.59 : x
  2. Step 2: Convert to fraction form
    265.11/398.07 = 253.59/x
  3. Step 3: Cross multiply
    265.11x = 398.07 × 253.59
  4. Step 4: Simplify right side
    265.11x = 100,946.57
  5. Step 5: Solve for x
    x = 100,946.57/265.11
  6. Step 6: Final answer
    x = 380.77

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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.