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Finding the Fourth Proportional to 372,235.20, 559,735.20 and 311,409.60

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Solution

The fourth proportional to 372,235.20, 559,735.20 and 311,409.60 is: 468,270.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,235.20 : 559,735.20 = 311,409.60 : x
  2. Step 2: Convert to fraction form
    372,235.20/559,735.20 = 311,409.60/x
  3. Step 3: Cross multiply
    372,235.20x = 559,735.20 × 311,409.60
  4. Step 4: Simplify right side
    372,235.20x = 174,306,914,737.92
  5. Step 5: Solve for x
    x = 174,306,914,737.92/372,235.20
  6. Step 6: Final answer
    x = 468,270.91

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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.