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Finding the Fourth Proportional to 505,739.78, 758,079.82 and 235,645.21

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Solution

The fourth proportional to 505,739.78, 758,079.82 and 235,645.21 is: 353,220.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,739.78 : 758,079.82 = 235,645.21 : x
  2. Step 2: Convert to fraction form
    505,739.78/758,079.82 = 235,645.21/x
  3. Step 3: Cross multiply
    505,739.78x = 758,079.82 × 235,645.21
  4. Step 4: Simplify right side
    505,739.78x = 178,637,878,380.66
  5. Step 5: Solve for x
    x = 178,637,878,380.66/505,739.78
  6. Step 6: Final answer
    x = 353,220.94

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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.