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Finding the Fourth Proportional to 325,638.28, 488,418.54 and 89,001.64

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Solution

The fourth proportional to 325,638.28, 488,418.54 and 89,001.64 is: 133,491.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,638.28 : 488,418.54 = 89,001.64 : x
  2. Step 2: Convert to fraction form
    325,638.28/488,418.54 = 89,001.64/x
  3. Step 3: Cross multiply
    325,638.28x = 488,418.54 × 89,001.64
  4. Step 4: Simplify right side
    325,638.28x = 43,470,051,066.41
  5. Step 5: Solve for x
    x = 43,470,051,066.41/325,638.28
  6. Step 6: Final answer
    x = 133,491.83

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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.