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Finding the Fourth Proportional to 627.58, 865.21 and 450.81

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Solution

The fourth proportional to 627.58, 865.21 and 450.81 is: 621.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.58 : 865.21 = 450.81 : x
  2. Step 2: Convert to fraction form
    627.58/865.21 = 450.81/x
  3. Step 3: Cross multiply
    627.58x = 865.21 × 450.81
  4. Step 4: Simplify right side
    627.58x = 390,045.32
  5. Step 5: Solve for x
    x = 390,045.32/627.58
  6. Step 6: Final answer
    x = 621.51

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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.