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Finding the Fourth Proportional to 450.14, 621.20 and 275.48

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Solution

The fourth proportional to 450.14, 621.20 and 275.48 is: 380.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.14 : 621.20 = 275.48 : x
  2. Step 2: Convert to fraction form
    450.14/621.20 = 275.48/x
  3. Step 3: Cross multiply
    450.14x = 621.20 × 275.48
  4. Step 4: Simplify right side
    450.14x = 171,128.18
  5. Step 5: Solve for x
    x = 171,128.18/450.14
  6. Step 6: Final answer
    x = 380.17

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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.