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Finding the Fourth Proportional to 522,048.80, 781,906.80 and 428,736.80

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Solution

The fourth proportional to 522,048.80, 781,906.80 and 428,736.80 is: 642,147.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,048.80 : 781,906.80 = 428,736.80 : x
  2. Step 2: Convert to fraction form
    522,048.80/781,906.80 = 428,736.80/x
  3. Step 3: Cross multiply
    522,048.80x = 781,906.80 × 428,736.80
  4. Step 4: Simplify right side
    522,048.80x = 335,232,219,330.24
  5. Step 5: Solve for x
    x = 335,232,219,330.24/522,048.80
  6. Step 6: Final answer
    x = 642,147.28

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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.