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Finding the Fourth Proportional to 398,811.46, 550,392.42 and 226,783.30

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Solution

The fourth proportional to 398,811.46, 550,392.42 and 226,783.30 is: 312,979.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,811.46 : 550,392.42 = 226,783.30 : x
  2. Step 2: Convert to fraction form
    398,811.46/550,392.42 = 226,783.30/x
  3. Step 3: Cross multiply
    398,811.46x = 550,392.42 × 226,783.30
  4. Step 4: Simplify right side
    398,811.46x = 124,819,809,302.59
  5. Step 5: Solve for x
    x = 124,819,809,302.59/398,811.46
  6. Step 6: Final answer
    x = 312,979.49

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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.