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Finding the Fourth Proportional to 608.88, 913.08 and 218.76

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Solution

The fourth proportional to 608.88, 913.08 and 218.76 is: 328.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.88 : 913.08 = 218.76 : x
  2. Step 2: Convert to fraction form
    608.88/913.08 = 218.76/x
  3. Step 3: Cross multiply
    608.88x = 913.08 × 218.76
  4. Step 4: Simplify right side
    608.88x = 199,745.38
  5. Step 5: Solve for x
    x = 199,745.38/608.88
  6. Step 6: Final answer
    x = 328.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.