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Finding the Fourth Proportional to 558,199.72, 770,335.92 and 319,781.80

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Solution

The fourth proportional to 558,199.72, 770,335.92 and 319,781.80 is: 441,310.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,199.72 : 770,335.92 = 319,781.80 : x
  2. Step 2: Convert to fraction form
    558,199.72/770,335.92 = 319,781.80/x
  3. Step 3: Cross multiply
    558,199.72x = 770,335.92 × 319,781.80
  4. Step 4: Simplify right side
    558,199.72x = 246,339,407,102.26
  5. Step 5: Solve for x
    x = 246,339,407,102.26/558,199.72
  6. Step 6: Final answer
    x = 441,310.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.