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Finding the Fourth Proportional to 398,772.72, 550,167.39 and 255,611.70

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Solution

The fourth proportional to 398,772.72, 550,167.39 and 255,611.70 is: 352,655.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,772.72 : 550,167.39 = 255,611.70 : x
  2. Step 2: Convert to fraction form
    398,772.72/550,167.39 = 255,611.70/x
  3. Step 3: Cross multiply
    398,772.72x = 550,167.39 × 255,611.70
  4. Step 4: Simplify right side
    398,772.72x = 140,629,221,842.46
  5. Step 5: Solve for x
    x = 140,629,221,842.46/398,772.72
  6. Step 6: Final answer
    x = 352,655.07

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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.