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Finding the Fourth Proportional to 627.69, 865.80 and 450.66

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Solution

The fourth proportional to 627.69, 865.80 and 450.66 is: 621.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.69 : 865.80 = 450.66 : x
  2. Step 2: Convert to fraction form
    627.69/865.80 = 450.66/x
  3. Step 3: Cross multiply
    627.69x = 865.80 × 450.66
  4. Step 4: Simplify right side
    627.69x = 390,181.43
  5. Step 5: Solve for x
    x = 390,181.43/627.69
  6. Step 6: Final answer
    x = 621.61

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1.5x scale

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.