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Finding the Fourth Proportional to 216,220.80, 324,331.20 and 156,777.60

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Solution

The fourth proportional to 216,220.80, 324,331.20 and 156,777.60 is: 235,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,220.80 : 324,331.20 = 156,777.60 : x
  2. Step 2: Convert to fraction form
    216,220.80/324,331.20 = 156,777.60/x
  3. Step 3: Cross multiply
    216,220.80x = 324,331.20 × 156,777.60
  4. Step 4: Simplify right side
    216,220.80x = 50,847,867,141.12
  5. Step 5: Solve for x
    x = 50,847,867,141.12/216,220.80
  6. Step 6: Final answer
    x = 235,166.40

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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.