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Finding the Fourth Proportional to 496,915.11, 685,691.33 and 279,148.23

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Solution

The fourth proportional to 496,915.11, 685,691.33 and 279,148.23 is: 385,195.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,915.11 : 685,691.33 = 279,148.23 : x
  2. Step 2: Convert to fraction form
    496,915.11/685,691.33 = 279,148.23/x
  3. Step 3: Cross multiply
    496,915.11x = 685,691.33 × 279,148.23
  4. Step 4: Simplify right side
    496,915.11x = 191,409,519,700.11
  5. Step 5: Solve for x
    x = 191,409,519,700.11/496,915.11
  6. Step 6: Final answer
    x = 385,195.61

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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.