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Finding the Fourth Proportional to 616,021.20, 923,902.20 and 261,046.80

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Solution

The fourth proportional to 616,021.20, 923,902.20 and 261,046.80 is: 391,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,021.20 : 923,902.20 = 261,046.80 : x
  2. Step 2: Convert to fraction form
    616,021.20/923,902.20 = 261,046.80/x
  3. Step 3: Cross multiply
    616,021.20x = 923,902.20 × 261,046.80
  4. Step 4: Simplify right side
    616,021.20x = 241,181,712,822.96
  5. Step 5: Solve for x
    x = 241,181,712,822.96/616,021.20
  6. Step 6: Final answer
    x = 391,515.28

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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.