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Finding the Fourth Proportional to 579,098.79, 868,660.80 and 407,619.76

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Solution

The fourth proportional to 579,098.79, 868,660.80 and 407,619.76 is: 611,438.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,098.79 : 868,660.80 = 407,619.76 : x
  2. Step 2: Convert to fraction form
    579,098.79/868,660.80 = 407,619.76/x
  3. Step 3: Cross multiply
    579,098.79x = 868,660.80 × 407,619.76
  4. Step 4: Simplify right side
    579,098.79x = 354,083,306,817.41
  5. Step 5: Solve for x
    x = 354,083,306,817.41/579,098.79
  6. Step 6: Final answer
    x = 611,438.52

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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.