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Finding the Fourth Proportional to 450.67, 621.90 and 251.50

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Solution

The fourth proportional to 450.67, 621.90 and 251.50 is: 347.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.67 : 621.90 = 251.50 : x
  2. Step 2: Convert to fraction form
    450.67/621.90 = 251.50/x
  3. Step 3: Cross multiply
    450.67x = 621.90 × 251.50
  4. Step 4: Simplify right side
    450.67x = 156,404.74
  5. Step 5: Solve for x
    x = 156,404.74/450.67
  6. Step 6: Final answer
    x = 347.05

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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.