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Finding the Fourth Proportional to 2,638,369.92, 3,957,840 and 840,830.88

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Solution

The fourth proportional to 2,638,369.92, 3,957,840 and 840,830.88 is: 1,261,337.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638,369.92 : 3,957,840 = 840,830.88 : x
  2. Step 2: Convert to fraction form
    2,638,369.92/3,957,840 = 840,830.88/x
  3. Step 3: Cross multiply
    2,638,369.92x = 3,957,840 × 840,830.88
  4. Step 4: Simplify right side
    2,638,369.92x = 3,327,874,090,099.20
  5. Step 5: Solve for x
    x = 3,327,874,090,099.20/2,638,369.92
  6. Step 6: Final answer
    x = 1,261,337.19

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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.