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Finding the Fourth Proportional to 216,389.20, 324,000.60 and 156,902.80

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Solution

The fourth proportional to 216,389.20, 324,000.60 and 156,902.80 is: 234,931.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,389.20 : 324,000.60 = 156,902.80 : x
  2. Step 2: Convert to fraction form
    216,389.20/324,000.60 = 156,902.80/x
  3. Step 3: Cross multiply
    216,389.20x = 324,000.60 × 156,902.80
  4. Step 4: Simplify right side
    216,389.20x = 50,836,601,341.68
  5. Step 5: Solve for x
    x = 50,836,601,341.68/216,389.20
  6. Step 6: Final answer
    x = 234,931.32

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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.