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Finding the Fourth Proportional to 413,231.60, 619,847.40 and 279,387.20

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Solution

The fourth proportional to 413,231.60, 619,847.40 and 279,387.20 is: 419,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,231.60 : 619,847.40 = 279,387.20 : x
  2. Step 2: Convert to fraction form
    413,231.60/619,847.40 = 279,387.20/x
  3. Step 3: Cross multiply
    413,231.60x = 619,847.40 × 279,387.20
  4. Step 4: Simplify right side
    413,231.60x = 173,177,429,513.28
  5. Step 5: Solve for x
    x = 173,177,429,513.28/413,231.60
  6. Step 6: Final answer
    x = 419,080.80

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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.