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Finding the Fourth Proportional to 616.68, 850.50 and 478.44

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Solution

The fourth proportional to 616.68, 850.50 and 478.44 is: 659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.68 : 850.50 = 478.44 : x
  2. Step 2: Convert to fraction form
    616.68/850.50 = 478.44/x
  3. Step 3: Cross multiply
    616.68x = 850.50 × 478.44
  4. Step 4: Simplify right side
    616.68x = 406,913.22
  5. Step 5: Solve for x
    x = 406,913.22/616.68
  6. Step 6: Final answer
    x = 659.85

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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.