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Finding the Fourth Proportional to 616.64, 850.48 and 451.40

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Solution

The fourth proportional to 616.64, 850.48 and 451.40 is: 622.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.64 : 850.48 = 451.40 : x
  2. Step 2: Convert to fraction form
    616.64/850.48 = 451.40/x
  3. Step 3: Cross multiply
    616.64x = 850.48 × 451.40
  4. Step 4: Simplify right side
    616.64x = 383,906.67
  5. Step 5: Solve for x
    x = 383,906.67/616.64
  6. Step 6: Final answer
    x = 622.58

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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.