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Finding the Fourth Proportional to 391,877.32, 540,796.31 and 293,586.40

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Solution

The fourth proportional to 391,877.32, 540,796.31 and 293,586.40 is: 405,153.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,877.32 : 540,796.31 = 293,586.40 : x
  2. Step 2: Convert to fraction form
    391,877.32/540,796.31 = 293,586.40/x
  3. Step 3: Cross multiply
    391,877.32x = 540,796.31 × 293,586.40
  4. Step 4: Simplify right side
    391,877.32x = 158,770,440,318.25
  5. Step 5: Solve for x
    x = 158,770,440,318.25/391,877.32
  6. Step 6: Final answer
    x = 405,153.43

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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.