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Finding the Fourth Proportional to 501,335.79, 691,840.53 and 271,890.78

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Solution

The fourth proportional to 501,335.79, 691,840.53 and 271,890.78 is: 375,207.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,335.79 : 691,840.53 = 271,890.78 : x
  2. Step 2: Convert to fraction form
    501,335.79/691,840.53 = 271,890.78/x
  3. Step 3: Cross multiply
    501,335.79x = 691,840.53 × 271,890.78
  4. Step 4: Simplify right side
    501,335.79x = 188,105,061,337.31
  5. Step 5: Solve for x
    x = 188,105,061,337.31/501,335.79
  6. Step 6: Final answer
    x = 375,207.73

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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.