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Finding the Fourth Proportional to 362,420.80, 543,631.20 and 212,732.80

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Solution

The fourth proportional to 362,420.80, 543,631.20 and 212,732.80 is: 319,099.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,420.80 : 543,631.20 = 212,732.80 : x
  2. Step 2: Convert to fraction form
    362,420.80/543,631.20 = 212,732.80/x
  3. Step 3: Cross multiply
    362,420.80x = 543,631.20 × 212,732.80
  4. Step 4: Simplify right side
    362,420.80x = 115,648,187,343.36
  5. Step 5: Solve for x
    x = 115,648,187,343.36/362,420.80
  6. Step 6: Final answer
    x = 319,099.20

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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.