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Finding the Fourth Proportional to 331,638.70, 497,652.45 and 121,297.90

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Solution

The fourth proportional to 331,638.70, 497,652.45 and 121,297.90 is: 182,017.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,638.70 : 497,652.45 = 121,297.90 : x
  2. Step 2: Convert to fraction form
    331,638.70/497,652.45 = 121,297.90/x
  3. Step 3: Cross multiply
    331,638.70x = 497,652.45 × 121,297.90
  4. Step 4: Simplify right side
    331,638.70x = 60,364,197,114.86
  5. Step 5: Solve for x
    x = 60,364,197,114.86/331,638.70
  6. Step 6: Final answer
    x = 182,017.95

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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.