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Finding the Fourth Proportional to 400,018.72, 599,939.10 and 115,647.16

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Solution

The fourth proportional to 400,018.72, 599,939.10 and 115,647.16 is: 173,445.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,018.72 : 599,939.10 = 115,647.16 : x
  2. Step 2: Convert to fraction form
    400,018.72/599,939.10 = 115,647.16/x
  3. Step 3: Cross multiply
    400,018.72x = 599,939.10 × 115,647.16
  4. Step 4: Simplify right side
    400,018.72x = 69,381,253,087.96
  5. Step 5: Solve for x
    x = 69,381,253,087.96/400,018.72
  6. Step 6: Final answer
    x = 173,445.02

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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.