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Finding the Fourth Proportional to 715,809.60, 987,843.60 and 409,933.44

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Solution

The fourth proportional to 715,809.60, 987,843.60 and 409,933.44 is: 565,723.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,809.60 : 987,843.60 = 409,933.44 : x
  2. Step 2: Convert to fraction form
    715,809.60/987,843.60 = 409,933.44/x
  3. Step 3: Cross multiply
    715,809.60x = 987,843.60 × 409,933.44
  4. Step 4: Simplify right side
    715,809.60x = 404,950,125,129.98
  5. Step 5: Solve for x
    x = 404,950,125,129.98/715,809.60
  6. Step 6: Final answer
    x = 565,723.24

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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.