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Finding the Fourth Proportional to 978,436.36, 1,465,580.94 and 739,142.92

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Solution

The fourth proportional to 978,436.36, 1,465,580.94 and 739,142.92 is: 1,107,147.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,436.36 : 1,465,580.94 = 739,142.92 : x
  2. Step 2: Convert to fraction form
    978,436.36/1,465,580.94 = 739,142.92/x
  3. Step 3: Cross multiply
    978,436.36x = 1,465,580.94 × 739,142.92
  4. Step 4: Simplify right side
    978,436.36x = 1,083,273,775,487.94
  5. Step 5: Solve for x
    x = 1,083,273,775,487.94/978,436.36
  6. Step 6: Final answer
    x = 1,107,147.91

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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.