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Finding the Fourth Proportional to 978,930.77, 1,351,005.89 and 543,389.11

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Solution

The fourth proportional to 978,930.77, 1,351,005.89 and 543,389.11 is: 749,922.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,930.77 : 1,351,005.89 = 543,389.11 : x
  2. Step 2: Convert to fraction form
    978,930.77/1,351,005.89 = 543,389.11/x
  3. Step 3: Cross multiply
    978,930.77x = 1,351,005.89 × 543,389.11
  4. Step 4: Simplify right side
    978,930.77x = 734,121,882,077.40
  5. Step 5: Solve for x
    x = 734,121,882,077.40/978,930.77
  6. Step 6: Final answer
    x = 749,922.17

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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.