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Finding the Fourth Proportional to 399,479.16, 599,221.02 and 133,238.90

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Solution

The fourth proportional to 399,479.16, 599,221.02 and 133,238.90 is: 199,859.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,479.16 : 599,221.02 = 133,238.90 : x
  2. Step 2: Convert to fraction form
    399,479.16/599,221.02 = 133,238.90/x
  3. Step 3: Cross multiply
    399,479.16x = 599,221.02 × 133,238.90
  4. Step 4: Simplify right side
    399,479.16x = 79,839,549,561.68
  5. Step 5: Solve for x
    x = 79,839,549,561.68/399,479.16
  6. Step 6: Final answer
    x = 199,859.11

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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.