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Finding the Fourth Proportional to 216,212.80, 324,319.20 and 156,769.60

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Solution

The fourth proportional to 216,212.80, 324,319.20 and 156,769.60 is: 235,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,212.80 : 324,319.20 = 156,769.60 : x
  2. Step 2: Convert to fraction form
    216,212.80/324,319.20 = 156,769.60/x
  3. Step 3: Cross multiply
    216,212.80x = 324,319.20 × 156,769.60
  4. Step 4: Simplify right side
    216,212.80x = 50,843,391,256.32
  5. Step 5: Solve for x
    x = 50,843,391,256.32/216,212.80
  6. Step 6: Final answer
    x = 235,154.40

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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.