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Finding the Fourth Proportional to 331,636.80, 497,491.65 and 121,320.30

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Solution

The fourth proportional to 331,636.80, 497,491.65 and 121,320.30 is: 181,993.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,636.80 : 497,491.65 = 121,320.30 : x
  2. Step 2: Convert to fraction form
    331,636.80/497,491.65 = 121,320.30/x
  3. Step 3: Cross multiply
    331,636.80x = 497,491.65 × 121,320.30
  4. Step 4: Simplify right side
    331,636.80x = 60,355,836,225.50
  5. Step 5: Solve for x
    x = 60,355,836,225.50/331,636.80
  6. Step 6: Final answer
    x = 181,993.78

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1.5x scale

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.