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Finding the Fourth Proportional to 399,651.40, 599,422.38 and 133,405.84

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Solution

The fourth proportional to 399,651.40, 599,422.38 and 133,405.84 is: 200,090.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,651.40 : 599,422.38 = 133,405.84 : x
  2. Step 2: Convert to fraction form
    399,651.40/599,422.38 = 133,405.84/x
  3. Step 3: Cross multiply
    399,651.40x = 599,422.38 × 133,405.84
  4. Step 4: Simplify right side
    399,651.40x = 79,966,446,118.70
  5. Step 5: Solve for x
    x = 79,966,446,118.70/399,651.40
  6. Step 6: Final answer
    x = 200,090.49

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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.