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Finding the Fourth Proportional to 331,638.47, 497,562.86 and 118,401.81

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Solution

The fourth proportional to 331,638.47, 497,562.86 and 118,401.81 is: 177,640.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,638.47 : 497,562.86 = 118,401.81 : x
  2. Step 2: Convert to fraction form
    331,638.47/497,562.86 = 118,401.81/x
  3. Step 3: Cross multiply
    331,638.47x = 497,562.86 × 118,401.81
  4. Step 4: Simplify right side
    331,638.47x = 58,912,343,212.78
  5. Step 5: Solve for x
    x = 58,912,343,212.78/331,638.47
  6. Step 6: Final answer
    x = 177,640.26

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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.