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Finding the Fourth Proportional to 2,431.86, 3,644.94 and 971.43

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Solution

The fourth proportional to 2,431.86, 3,644.94 and 971.43 is: 1,456.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.86 : 3,644.94 = 971.43 : x
  2. Step 2: Convert to fraction form
    2,431.86/3,644.94 = 971.43/x
  3. Step 3: Cross multiply
    2,431.86x = 3,644.94 × 971.43
  4. Step 4: Simplify right side
    2,431.86x = 3,540,804.06
  5. Step 5: Solve for x
    x = 3,540,804.06/2,431.86
  6. Step 6: Final answer
    x = 1,456.01

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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.