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Finding the Fourth Proportional to 577,649.80, 866,766.30 and 261,905.32

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Solution

The fourth proportional to 577,649.80, 866,766.30 and 261,905.32 is: 392,990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,649.80 : 866,766.30 = 261,905.32 : x
  2. Step 2: Convert to fraction form
    577,649.80/866,766.30 = 261,905.32/x
  3. Step 3: Cross multiply
    577,649.80x = 866,766.30 × 261,905.32
  4. Step 4: Simplify right side
    577,649.80x = 227,010,705,166.72
  5. Step 5: Solve for x
    x = 227,010,705,166.72/577,649.80
  6. Step 6: Final answer
    x = 392,990.19

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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.