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Finding the Fourth Proportional to 450.05, 621.17 and 284.15

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Solution

The fourth proportional to 450.05, 621.17 and 284.15 is: 392.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.05 : 621.17 = 284.15 : x
  2. Step 2: Convert to fraction form
    450.05/621.17 = 284.15/x
  3. Step 3: Cross multiply
    450.05x = 621.17 × 284.15
  4. Step 4: Simplify right side
    450.05x = 176,505.46
  5. Step 5: Solve for x
    x = 176,505.46/450.05
  6. Step 6: Final answer
    x = 392.19

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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.