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Finding the Fourth Proportional to 666,473.96, 919,078.68 and 611,152.56

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Solution

The fourth proportional to 666,473.96, 919,078.68 and 611,152.56 is: 842,789.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,473.96 : 919,078.68 = 611,152.56 : x
  2. Step 2: Convert to fraction form
    666,473.96/919,078.68 = 611,152.56/x
  3. Step 3: Cross multiply
    666,473.96x = 919,078.68 × 611,152.56
  4. Step 4: Simplify right side
    666,473.96x = 561,697,288,123.42
  5. Step 5: Solve for x
    x = 561,697,288,123.42/666,473.96
  6. Step 6: Final answer
    x = 842,789.55

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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.