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Finding the Fourth Proportional to 318,398.39, 439,591.49 and 197,667.79

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Solution

The fourth proportional to 318,398.39, 439,591.49 and 197,667.79 is: 272,906.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,398.39 : 439,591.49 = 197,667.79 : x
  2. Step 2: Convert to fraction form
    318,398.39/439,591.49 = 197,667.79/x
  3. Step 3: Cross multiply
    318,398.39x = 439,591.49 × 197,667.79
  4. Step 4: Simplify right side
    318,398.39x = 86,893,076,985.04
  5. Step 5: Solve for x
    x = 86,893,076,985.04/318,398.39
  6. Step 6: Final answer
    x = 272,906.77

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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.