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Finding the Fourth Proportional to 577,999.80, 866,999.70 and 378,545.40

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Solution

The fourth proportional to 577,999.80, 866,999.70 and 378,545.40 is: 567,818.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,999.80 : 866,999.70 = 378,545.40 : x
  2. Step 2: Convert to fraction form
    577,999.80/866,999.70 = 378,545.40/x
  3. Step 3: Cross multiply
    577,999.80x = 866,999.70 × 378,545.40
  4. Step 4: Simplify right side
    577,999.80x = 328,198,748,236.38
  5. Step 5: Solve for x
    x = 328,198,748,236.38/577,999.80
  6. Step 6: Final answer
    x = 567,818.10

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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.