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Finding the Fourth Proportional to 986,610.78, 1,361,524.08 and 533,901.78

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Solution

The fourth proportional to 986,610.78, 1,361,524.08 and 533,901.78 is: 736,785.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,610.78 : 1,361,524.08 = 533,901.78 : x
  2. Step 2: Convert to fraction form
    986,610.78/1,361,524.08 = 533,901.78/x
  3. Step 3: Cross multiply
    986,610.78x = 1,361,524.08 × 533,901.78
  4. Step 4: Simplify right side
    986,610.78x = 726,920,129,824.86
  5. Step 5: Solve for x
    x = 726,920,129,824.86/986,610.78
  6. Step 6: Final answer
    x = 736,785.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.