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Finding the Fourth Proportional to 986.79, 1,480.22 and 293.44

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Solution

The fourth proportional to 986.79, 1,480.22 and 293.44 is: 440.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.79 : 1,480.22 = 293.44 : x
  2. Step 2: Convert to fraction form
    986.79/1,480.22 = 293.44/x
  3. Step 3: Cross multiply
    986.79x = 1,480.22 × 293.44
  4. Step 4: Simplify right side
    986.79x = 434,355.76
  5. Step 5: Solve for x
    x = 434,355.76/986.79
  6. Step 6: Final answer
    x = 440.17

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Double scale
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1.5x scale

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.