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Finding the Fourth Proportional to 381,351.20, 572,026.80 and 223,887.20

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Solution

The fourth proportional to 381,351.20, 572,026.80 and 223,887.20 is: 335,830.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,351.20 : 572,026.80 = 223,887.20 : x
  2. Step 2: Convert to fraction form
    381,351.20/572,026.80 = 223,887.20/x
  3. Step 3: Cross multiply
    381,351.20x = 572,026.80 × 223,887.20
  4. Step 4: Simplify right side
    381,351.20x = 128,069,478,576.96
  5. Step 5: Solve for x
    x = 128,069,478,576.96/381,351.20
  6. Step 6: Final answer
    x = 335,830.80

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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.