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Finding the Fourth Proportional to 577,843.20, 867,801.60 and 420,249.60

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Solution

The fourth proportional to 577,843.20, 867,801.60 and 420,249.60 is: 631,128.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,843.20 : 867,801.60 = 420,249.60 : x
  2. Step 2: Convert to fraction form
    577,843.20/867,801.60 = 420,249.60/x
  3. Step 3: Cross multiply
    577,843.20x = 867,801.60 × 420,249.60
  4. Step 4: Simplify right side
    577,843.20x = 364,693,275,279.36
  5. Step 5: Solve for x
    x = 364,693,275,279.36/577,843.20
  6. Step 6: Final answer
    x = 631,128.44

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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.