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Finding the Fourth Proportional to 275.30, 380.07 and 247.28

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Solution

The fourth proportional to 275.30, 380.07 and 247.28 is: 341.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.30 : 380.07 = 247.28 : x
  2. Step 2: Convert to fraction form
    275.30/380.07 = 247.28/x
  3. Step 3: Cross multiply
    275.30x = 380.07 × 247.28
  4. Step 4: Simplify right side
    275.30x = 93,981.81
  5. Step 5: Solve for x
    x = 93,981.81/275.30
  6. Step 6: Final answer
    x = 341.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.