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Finding the Fourth Proportional to 668,221.68, 921,253.82 and 530,856.38

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Solution

The fourth proportional to 668,221.68, 921,253.82 and 530,856.38 is: 731,873.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,221.68 : 921,253.82 = 530,856.38 : x
  2. Step 2: Convert to fraction form
    668,221.68/921,253.82 = 530,856.38/x
  3. Step 3: Cross multiply
    668,221.68x = 921,253.82 × 530,856.38
  4. Step 4: Simplify right side
    668,221.68x = 489,053,462,511.92
  5. Step 5: Solve for x
    x = 489,053,462,511.92/668,221.68
  6. Step 6: Final answer
    x = 731,873.09

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Double scale
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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.