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Finding the Fourth Proportional to 2,153,578.78, 2,972,082.54 and 1,186,708.92

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Solution

The fourth proportional to 2,153,578.78, 2,972,082.54 and 1,186,708.92 is: 1,637,737.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153,578.78 : 2,972,082.54 = 1,186,708.92 : x
  2. Step 2: Convert to fraction form
    2,153,578.78/2,972,082.54 = 1,186,708.92/x
  3. Step 3: Cross multiply
    2,153,578.78x = 2,972,082.54 × 1,186,708.92
  4. Step 4: Simplify right side
    2,153,578.78x = 3,526,996,861,194.26
  5. Step 5: Solve for x
    x = 3,526,996,861,194.26/2,153,578.78
  6. Step 6: Final answer
    x = 1,637,737.56

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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.