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Finding the Fourth Proportional to 612,784.80, 918,193.05 and 577,355.40

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Solution

The fourth proportional to 612,784.80, 918,193.05 and 577,355.40 is: 865,105.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,784.80 : 918,193.05 = 577,355.40 : x
  2. Step 2: Convert to fraction form
    612,784.80/918,193.05 = 577,355.40/x
  3. Step 3: Cross multiply
    612,784.80x = 918,193.05 × 577,355.40
  4. Step 4: Simplify right side
    612,784.80x = 530,123,715,659.97
  5. Step 5: Solve for x
    x = 530,123,715,659.97/612,784.80
  6. Step 6: Final answer
    x = 865,105.85

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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.