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Finding the Fourth Proportional to 307,981.80, 461,972.70 and 251,994.60

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Solution

The fourth proportional to 307,981.80, 461,972.70 and 251,994.60 is: 377,991.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,981.80 : 461,972.70 = 251,994.60 : x
  2. Step 2: Convert to fraction form
    307,981.80/461,972.70 = 251,994.60/x
  3. Step 3: Cross multiply
    307,981.80x = 461,972.70 × 251,994.60
  4. Step 4: Simplify right side
    307,981.80x = 116,414,625,747.42
  5. Step 5: Solve for x
    x = 116,414,625,747.42/307,981.80
  6. Step 6: Final answer
    x = 377,991.90

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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.