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Finding the Fourth Proportional to 393,700.56, 590,513.40 and 156,979.92

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Solution

The fourth proportional to 393,700.56, 590,513.40 and 156,979.92 is: 235,454.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,700.56 : 590,513.40 = 156,979.92 : x
  2. Step 2: Convert to fraction form
    393,700.56/590,513.40 = 156,979.92/x
  3. Step 3: Cross multiply
    393,700.56x = 590,513.40 × 156,979.92
  4. Step 4: Simplify right side
    393,700.56x = 92,698,746,290.93
  5. Step 5: Solve for x
    x = 92,698,746,290.93/393,700.56
  6. Step 6: Final answer
    x = 235,454.95

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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.