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Finding the Fourth Proportional to 986.75, 1,480.38 and 293.39

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Solution

The fourth proportional to 986.75, 1,480.38 and 293.39 is: 440.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.75 : 1,480.38 = 293.39 : x
  2. Step 2: Convert to fraction form
    986.75/1,480.38 = 293.39/x
  3. Step 3: Cross multiply
    986.75x = 1,480.38 × 293.39
  4. Step 4: Simplify right side
    986.75x = 434,328.69
  5. Step 5: Solve for x
    x = 434,328.69/986.75
  6. Step 6: Final answer
    x = 440.16

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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.