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Finding the Fourth Proportional to 407,480.80, 611,279.43 and 127,019.92

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Solution

The fourth proportional to 407,480.80, 611,279.43 and 127,019.92 is: 190,548.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,480.80 : 611,279.43 = 127,019.92 : x
  2. Step 2: Convert to fraction form
    407,480.80/611,279.43 = 127,019.92/x
  3. Step 3: Cross multiply
    407,480.80x = 611,279.43 × 127,019.92
  4. Step 4: Simplify right side
    407,480.80x = 77,644,664,296.25
  5. Step 5: Solve for x
    x = 77,644,664,296.25/407,480.80
  6. Step 6: Final answer
    x = 190,548.03

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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.