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Finding the Fourth Proportional to 418,520.22, 577,843.08 and 280,905.48

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Solution

The fourth proportional to 418,520.22, 577,843.08 and 280,905.48 is: 387,840.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,520.22 : 577,843.08 = 280,905.48 : x
  2. Step 2: Convert to fraction form
    418,520.22/577,843.08 = 280,905.48/x
  3. Step 3: Cross multiply
    418,520.22x = 577,843.08 × 280,905.48
  4. Step 4: Simplify right side
    418,520.22x = 162,319,287,752.08
  5. Step 5: Solve for x
    x = 162,319,287,752.08/418,520.22
  6. Step 6: Final answer
    x = 387,840.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.