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Finding the Fourth Proportional to 400,003.20, 600,062.40 and 213,028.80

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Solution

The fourth proportional to 400,003.20, 600,062.40 and 213,028.80 is: 319,573.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,003.20 : 600,062.40 = 213,028.80 : x
  2. Step 2: Convert to fraction form
    400,003.20/600,062.40 = 213,028.80/x
  3. Step 3: Cross multiply
    400,003.20x = 600,062.40 × 213,028.80
  4. Step 4: Simplify right side
    400,003.20x = 127,830,572,997.12
  5. Step 5: Solve for x
    x = 127,830,572,997.12/400,003.20
  6. Step 6: Final answer
    x = 319,573.88

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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.