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Finding the Fourth Proportional to 422,551.74, 633,693.81 and 138,176.59

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Solution

The fourth proportional to 422,551.74, 633,693.81 and 138,176.59 is: 207,221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,551.74 : 633,693.81 = 138,176.59 : x
  2. Step 2: Convert to fraction form
    422,551.74/633,693.81 = 138,176.59/x
  3. Step 3: Cross multiply
    422,551.74x = 633,693.81 × 138,176.59
  4. Step 4: Simplify right side
    422,551.74x = 87,561,649,079.03
  5. Step 5: Solve for x
    x = 87,561,649,079.03/422,551.74
  6. Step 6: Final answer
    x = 207,221.13

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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.