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Finding the Fourth Proportional to 220,808.16, 330,920.56 and 80,431.92

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Solution

The fourth proportional to 220,808.16, 330,920.56 and 80,431.92 is: 120,541.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,808.16 : 330,920.56 = 80,431.92 : x
  2. Step 2: Convert to fraction form
    220,808.16/330,920.56 = 80,431.92/x
  3. Step 3: Cross multiply
    220,808.16x = 330,920.56 × 80,431.92
  4. Step 4: Simplify right side
    220,808.16x = 26,616,576,008.28
  5. Step 5: Solve for x
    x = 26,616,576,008.28/220,808.16
  6. Step 6: Final answer
    x = 120,541.63

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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.