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Finding the Fourth Proportional to 331,331.70, 497,127.15 and 120,990.90

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Solution

The fourth proportional to 331,331.70, 497,127.15 and 120,990.90 is: 181,533.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,331.70 : 497,127.15 = 120,990.90 : x
  2. Step 2: Convert to fraction form
    331,331.70/497,127.15 = 120,990.90/x
  3. Step 3: Cross multiply
    331,331.70x = 497,127.15 × 120,990.90
  4. Step 4: Simplify right side
    331,331.70x = 60,147,861,292.94
  5. Step 5: Solve for x
    x = 60,147,861,292.94/331,331.70
  6. Step 6: Final answer
    x = 181,533.68

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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.