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Finding the Fourth Proportional to 980, 1,467.92 and 614.36

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Solution

The fourth proportional to 980, 1,467.92 and 614.36 is: 920.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    980 : 1,467.92 = 614.36 : x
  2. Step 2: Convert to fraction form
    980/1,467.92 = 614.36/x
  3. Step 3: Cross multiply
    980x = 1,467.92 × 614.36
  4. Step 4: Simplify right side
    980x = 901,831.33
  5. Step 5: Solve for x
    x = 901,831.33/980
  6. Step 6: Final answer
    x = 920.24

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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.