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Finding the Fourth Proportional to 505,685.20, 758,633.40 and 168,712.40

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Solution

The fourth proportional to 505,685.20, 758,633.40 and 168,712.40 is: 253,103.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,685.20 : 758,633.40 = 168,712.40 : x
  2. Step 2: Convert to fraction form
    505,685.20/758,633.40 = 168,712.40/x
  3. Step 3: Cross multiply
    505,685.20x = 758,633.40 × 168,712.40
  4. Step 4: Simplify right side
    505,685.20x = 127,990,861,634.16
  5. Step 5: Solve for x
    x = 127,990,861,634.16/505,685.20
  6. Step 6: Final answer
    x = 253,103.83

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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.