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Finding the Fourth Proportional to 279,812.40, 419,718.60 and 102,260.40

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Solution

The fourth proportional to 279,812.40, 419,718.60 and 102,260.40 is: 153,390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,812.40 : 419,718.60 = 102,260.40 : x
  2. Step 2: Convert to fraction form
    279,812.40/419,718.60 = 102,260.40/x
  3. Step 3: Cross multiply
    279,812.40x = 419,718.60 × 102,260.40
  4. Step 4: Simplify right side
    279,812.40x = 42,920,591,923.44
  5. Step 5: Solve for x
    x = 42,920,591,923.44/279,812.40
  6. Step 6: Final answer
    x = 153,390.60

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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.