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Finding the Fourth Proportional to 257,891.80, 386,837.70 and 235,730.20

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Solution

The fourth proportional to 257,891.80, 386,837.70 and 235,730.20 is: 353,595.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,891.80 : 386,837.70 = 235,730.20 : x
  2. Step 2: Convert to fraction form
    257,891.80/386,837.70 = 235,730.20/x
  3. Step 3: Cross multiply
    257,891.80x = 386,837.70 × 235,730.20
  4. Step 4: Simplify right side
    257,891.80x = 91,189,328,388.54
  5. Step 5: Solve for x
    x = 91,189,328,388.54/257,891.80
  6. Step 6: Final answer
    x = 353,595.30

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1.5x scale

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.