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Finding the Fourth Proportional to 407,612.20, 611,504.70 and 123,279.40

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Solution

The fourth proportional to 407,612.20, 611,504.70 and 123,279.40 is: 184,945.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,612.20 : 611,504.70 = 123,279.40 : x
  2. Step 2: Convert to fraction form
    407,612.20/611,504.70 = 123,279.40/x
  3. Step 3: Cross multiply
    407,612.20x = 611,504.70 × 123,279.40
  4. Step 4: Simplify right side
    407,612.20x = 75,385,932,513.18
  5. Step 5: Solve for x
    x = 75,385,932,513.18/407,612.20
  6. Step 6: Final answer
    x = 184,945.23

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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.