Home / 639,120.04-882,305.22-397,480.44

Finding the Fourth Proportional to 639,120.04, 882,305.22 and 397,480.44

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Solution

The fourth proportional to 639,120.04, 882,305.22 and 397,480.44 is: 548,721.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,120.04 : 882,305.22 = 397,480.44 : x
  2. Step 2: Convert to fraction form
    639,120.04/882,305.22 = 397,480.44/x
  3. Step 3: Cross multiply
    639,120.04x = 882,305.22 × 397,480.44
  4. Step 4: Simplify right side
    639,120.04x = 350,699,067,059.90
  5. Step 5: Solve for x
    x = 350,699,067,059.90/639,120.04
  6. Step 6: Final answer
    x = 548,721.75

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Double scale
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Similar ratio
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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.