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Finding the Fourth Proportional to 258,909.21, 357,110.67 and 172,824.79

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Solution

The fourth proportional to 258,909.21, 357,110.67 and 172,824.79 is: 238,375.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,909.21 : 357,110.67 = 172,824.79 : x
  2. Step 2: Convert to fraction form
    258,909.21/357,110.67 = 172,824.79/x
  3. Step 3: Cross multiply
    258,909.21x = 357,110.67 × 172,824.79
  4. Step 4: Simplify right side
    258,909.21x = 61,717,576,974.41
  5. Step 5: Solve for x
    x = 61,717,576,974.41/258,909.21
  6. Step 6: Final answer
    x = 238,375.36

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1.5x scale

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.