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Finding the Fourth Proportional to 2,192.90, 3,289.34 and 959.99

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Solution

The fourth proportional to 2,192.90, 3,289.34 and 959.99 is: 1,439.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,192.90 : 3,289.34 = 959.99 : x
  2. Step 2: Convert to fraction form
    2,192.90/3,289.34 = 959.99/x
  3. Step 3: Cross multiply
    2,192.90x = 3,289.34 × 959.99
  4. Step 4: Simplify right side
    2,192.90x = 3,157,719.46
  5. Step 5: Solve for x
    x = 3,157,719.46/2,192.90
  6. Step 6: Final answer
    x = 1,439.98

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Similar ratio
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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.