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Finding the Fourth Proportional to 419,939.64, 579,491.72 and 238,626.41

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Solution

The fourth proportional to 419,939.64, 579,491.72 and 238,626.41 is: 329,290.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,939.64 : 579,491.72 = 238,626.41 : x
  2. Step 2: Convert to fraction form
    419,939.64/579,491.72 = 238,626.41/x
  3. Step 3: Cross multiply
    419,939.64x = 579,491.72 × 238,626.41
  4. Step 4: Simplify right side
    419,939.64x = 138,282,025,572.58
  5. Step 5: Solve for x
    x = 138,282,025,572.58/419,939.64
  6. Step 6: Final answer
    x = 329,290.24

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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.