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Finding the Fourth Proportional to 331,686.70, 497,420.70 and 121,297.30

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Solution

The fourth proportional to 331,686.70, 497,420.70 and 121,297.30 is: 181,905.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,686.70 : 497,420.70 = 121,297.30 : x
  2. Step 2: Convert to fraction form
    331,686.70/497,420.70 = 121,297.30/x
  3. Step 3: Cross multiply
    331,686.70x = 497,420.70 × 121,297.30
  4. Step 4: Simplify right side
    331,686.70x = 60,335,787,874.11
  5. Step 5: Solve for x
    x = 60,335,787,874.11/331,686.70
  6. Step 6: Final answer
    x = 181,905.96

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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.