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Finding the Fourth Proportional to 722,480.52, 996,979.26 and 400,171.80

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Solution

The fourth proportional to 722,480.52, 996,979.26 and 400,171.80 is: 552,212.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,480.52 : 996,979.26 = 400,171.80 : x
  2. Step 2: Convert to fraction form
    722,480.52/996,979.26 = 400,171.80/x
  3. Step 3: Cross multiply
    722,480.52x = 996,979.26 × 400,171.80
  4. Step 4: Simplify right side
    722,480.52x = 398,962,985,036.87
  5. Step 5: Solve for x
    x = 398,962,985,036.87/722,480.52
  6. Step 6: Final answer
    x = 552,212.79

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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.