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Finding the Fourth Proportional to 331,908.60, 497,805.30 and 121,438.20

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Solution

The fourth proportional to 331,908.60, 497,805.30 and 121,438.20 is: 182,136.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,908.60 : 497,805.30 = 121,438.20 : x
  2. Step 2: Convert to fraction form
    331,908.60/497,805.30 = 121,438.20/x
  3. Step 3: Cross multiply
    331,908.60x = 497,805.30 × 121,438.20
  4. Step 4: Simplify right side
    331,908.60x = 60,452,579,582.46
  5. Step 5: Solve for x
    x = 60,452,579,582.46/331,908.60
  6. Step 6: Final answer
    x = 182,136.23

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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.