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Finding the Fourth Proportional to 699,085.29, 964,728.53 and 393,161.59

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Solution

The fourth proportional to 699,085.29, 964,728.53 and 393,161.59 is: 542,557.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,085.29 : 964,728.53 = 393,161.59 : x
  2. Step 2: Convert to fraction form
    699,085.29/964,728.53 = 393,161.59/x
  3. Step 3: Cross multiply
    699,085.29x = 964,728.53 × 393,161.59
  4. Step 4: Simplify right side
    699,085.29x = 379,294,197,949.52
  5. Step 5: Solve for x
    x = 379,294,197,949.52/699,085.29
  6. Step 6: Final answer
    x = 542,557.83

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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.