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Finding the Fourth Proportional to 265.43, 398.15 and 253.13

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Solution

The fourth proportional to 265.43, 398.15 and 253.13 is: 379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.43 : 398.15 = 253.13 : x
  2. Step 2: Convert to fraction form
    265.43/398.15 = 253.13/x
  3. Step 3: Cross multiply
    265.43x = 398.15 × 253.13
  4. Step 4: Simplify right side
    265.43x = 100,783.71
  5. Step 5: Solve for x
    x = 100,783.71/265.43
  6. Step 6: Final answer
    x = 379.70

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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.