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Finding the Fourth Proportional to 616, 850.08 and 478.40

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Solution

The fourth proportional to 616, 850.08 and 478.40 is: 660.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    616 : 850.08 = 478.40 : x
  2. Step 2: Convert to fraction form
    616/850.08 = 478.40/x
  3. Step 3: Cross multiply
    616x = 850.08 × 478.40
  4. Step 4: Simplify right side
    616x = 406,678.27
  5. Step 5: Solve for x
    x = 406,678.27/616
  6. Step 6: Final answer
    x = 660.19

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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.