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Finding the Fourth Proportional to 986,577.40, 1,479,866.10 and 785,810.80

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Solution

The fourth proportional to 986,577.40, 1,479,866.10 and 785,810.80 is: 1,178,716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,577.40 : 1,479,866.10 = 785,810.80 : x
  2. Step 2: Convert to fraction form
    986,577.40/1,479,866.10 = 785,810.80/x
  3. Step 3: Cross multiply
    986,577.40x = 1,479,866.10 × 785,810.80
  4. Step 4: Simplify right side
    986,577.40x = 1,162,894,763,933.88
  5. Step 5: Solve for x
    x = 1,162,894,763,933.88/986,577.40
  6. Step 6: Final answer
    x = 1,178,716.20

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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.