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Finding the Fourth Proportional to 908.09, 1,360.20 and 614.60

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Solution

The fourth proportional to 908.09, 1,360.20 and 614.60 is: 920.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.09 : 1,360.20 = 614.60 : x
  2. Step 2: Convert to fraction form
    908.09/1,360.20 = 614.60/x
  3. Step 3: Cross multiply
    908.09x = 1,360.20 × 614.60
  4. Step 4: Simplify right side
    908.09x = 835,978.92
  5. Step 5: Solve for x
    x = 835,978.92/908.09
  6. Step 6: Final answer
    x = 920.59

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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.