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Finding the Fourth Proportional to 551.42, 761.18 and 450.95

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Solution

The fourth proportional to 551.42, 761.18 and 450.95 is: 622.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.42 : 761.18 = 450.95 : x
  2. Step 2: Convert to fraction form
    551.42/761.18 = 450.95/x
  3. Step 3: Cross multiply
    551.42x = 761.18 × 450.95
  4. Step 4: Simplify right side
    551.42x = 343,257.14
  5. Step 5: Solve for x
    x = 343,257.14/551.42
  6. Step 6: Final answer
    x = 622.50

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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.