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Finding the Fourth Proportional to 397,997.80, 596,996.70 and 131,799.40

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Solution

The fourth proportional to 397,997.80, 596,996.70 and 131,799.40 is: 197,699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,997.80 : 596,996.70 = 131,799.40 : x
  2. Step 2: Convert to fraction form
    397,997.80/596,996.70 = 131,799.40/x
  3. Step 3: Cross multiply
    397,997.80x = 596,996.70 × 131,799.40
  4. Step 4: Simplify right side
    397,997.80x = 78,683,806,861.98
  5. Step 5: Solve for x
    x = 78,683,806,861.98/397,997.80
  6. Step 6: Final answer
    x = 197,699.10

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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.