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Finding the Fourth Proportional to 657.11, 985.39 and 360.55

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Solution

The fourth proportional to 657.11, 985.39 and 360.55 is: 540.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.11 : 985.39 = 360.55 : x
  2. Step 2: Convert to fraction form
    657.11/985.39 = 360.55/x
  3. Step 3: Cross multiply
    657.11x = 985.39 × 360.55
  4. Step 4: Simplify right side
    657.11x = 355,282.36
  5. Step 5: Solve for x
    x = 355,282.36/657.11
  6. Step 6: Final answer
    x = 540.67

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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.