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Finding the Fourth Proportional to 611,067.60, 843,374.72 and 356,418.80

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Solution

The fourth proportional to 611,067.60, 843,374.72 and 356,418.80 is: 491,917.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,067.60 : 843,374.72 = 356,418.80 : x
  2. Step 2: Convert to fraction form
    611,067.60/843,374.72 = 356,418.80/x
  3. Step 3: Cross multiply
    611,067.60x = 843,374.72 × 356,418.80
  4. Step 4: Simplify right side
    611,067.60x = 300,594,605,652.74
  5. Step 5: Solve for x
    x = 300,594,605,652.74/611,067.60
  6. Step 6: Final answer
    x = 491,917.11

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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.