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Finding the Fourth Proportional to 418,998.96, 628,261.31 and 383,292.54

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Solution

The fourth proportional to 418,998.96, 628,261.31 and 383,292.54 is: 574,721.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,998.96 : 628,261.31 = 383,292.54 : x
  2. Step 2: Convert to fraction form
    418,998.96/628,261.31 = 383,292.54/x
  3. Step 3: Cross multiply
    418,998.96x = 628,261.31 × 383,292.54
  4. Step 4: Simplify right side
    418,998.96x = 240,807,874,251.86
  5. Step 5: Solve for x
    x = 240,807,874,251.86/418,998.96
  6. Step 6: Final answer
    x = 574,721.89

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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.