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Finding the Fourth Proportional to 615,532.60, 921,198.30 and 515,805.40

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Solution

The fourth proportional to 615,532.60, 921,198.30 and 515,805.40 is: 771,947.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,532.60 : 921,198.30 = 515,805.40 : x
  2. Step 2: Convert to fraction form
    615,532.60/921,198.30 = 515,805.40/x
  3. Step 3: Cross multiply
    615,532.60x = 921,198.30 × 515,805.40
  4. Step 4: Simplify right side
    615,532.60x = 475,159,057,610.82
  5. Step 5: Solve for x
    x = 475,159,057,610.82/615,532.60
  6. Step 6: Final answer
    x = 771,947.83

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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.