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Finding the Fourth Proportional to 577,844.20, 867,803.10 and 420,250.60

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Solution

The fourth proportional to 577,844.20, 867,803.10 and 420,250.60 is: 631,129.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,844.20 : 867,803.10 = 420,250.60 : x
  2. Step 2: Convert to fraction form
    577,844.20/867,803.10 = 420,250.60/x
  3. Step 3: Cross multiply
    577,844.20x = 867,803.10 × 420,250.60
  4. Step 4: Simplify right side
    577,844.20x = 364,694,773,456.86
  5. Step 5: Solve for x
    x = 364,694,773,456.86/577,844.20
  6. Step 6: Final answer
    x = 631,129.94

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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.