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Finding the Fourth Proportional to 558,951.42, 769,644.54 and 421,330.26

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Solution

The fourth proportional to 558,951.42, 769,644.54 and 421,330.26 is: 580,147.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,951.42 : 769,644.54 = 421,330.26 : x
  2. Step 2: Convert to fraction form
    558,951.42/769,644.54 = 421,330.26/x
  3. Step 3: Cross multiply
    558,951.42x = 769,644.54 × 421,330.26
  4. Step 4: Simplify right side
    558,951.42x = 324,274,534,145.78
  5. Step 5: Solve for x
    x = 324,274,534,145.78/558,951.42
  6. Step 6: Final answer
    x = 580,147.97

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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.