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Finding the Fourth Proportional to 331,712.40, 497,698.20 and 121,366.80

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Solution

The fourth proportional to 331,712.40, 497,698.20 and 121,366.80 is: 182,097.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,712.40 : 497,698.20 = 121,366.80 : x
  2. Step 2: Convert to fraction form
    331,712.40/497,698.20 = 121,366.80/x
  3. Step 3: Cross multiply
    331,712.40x = 497,698.20 × 121,366.80
  4. Step 4: Simplify right side
    331,712.40x = 60,404,037,899.76
  5. Step 5: Solve for x
    x = 60,404,037,899.76/331,712.40
  6. Step 6: Final answer
    x = 182,097.62

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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.