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Finding the Fourth Proportional to 556,515.60, 835,234.20 and 257,456.40

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Solution

The fourth proportional to 556,515.60, 835,234.20 and 257,456.40 is: 386,397.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,515.60 : 835,234.20 = 257,456.40 : x
  2. Step 2: Convert to fraction form
    556,515.60/835,234.20 = 257,456.40/x
  3. Step 3: Cross multiply
    556,515.60x = 835,234.20 × 257,456.40
  4. Step 4: Simplify right side
    556,515.60x = 215,036,390,288.88
  5. Step 5: Solve for x
    x = 215,036,390,288.88/556,515.60
  6. Step 6: Final answer
    x = 386,397.78

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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.