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Finding the Fourth Proportional to 340,047.20, 510,070.80 and 279,912.80

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Solution

The fourth proportional to 340,047.20, 510,070.80 and 279,912.80 is: 419,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,047.20 : 510,070.80 = 279,912.80 : x
  2. Step 2: Convert to fraction form
    340,047.20/510,070.80 = 279,912.80/x
  3. Step 3: Cross multiply
    340,047.20x = 510,070.80 × 279,912.80
  4. Step 4: Simplify right side
    340,047.20x = 142,775,345,826.24
  5. Step 5: Solve for x
    x = 142,775,345,826.24/340,047.20
  6. Step 6: Final answer
    x = 419,869.20

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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.