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Finding the Fourth Proportional to 415,053.81, 621,173.39 and 255,230.15

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Solution

The fourth proportional to 415,053.81, 621,173.39 and 255,230.15 is: 381,979.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,053.81 : 621,173.39 = 255,230.15 : x
  2. Step 2: Convert to fraction form
    415,053.81/621,173.39 = 255,230.15/x
  3. Step 3: Cross multiply
    415,053.81x = 621,173.39 × 255,230.15
  4. Step 4: Simplify right side
    415,053.81x = 158,542,173,123.69
  5. Step 5: Solve for x
    x = 158,542,173,123.69/415,053.81
  6. Step 6: Final answer
    x = 381,979.80

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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.