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Finding the Fourth Proportional to 309,334.36, 426,916.84 and 173,405.04

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Solution

The fourth proportional to 309,334.36, 426,916.84 and 173,405.04 is: 239,318.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,334.36 : 426,916.84 = 173,405.04 : x
  2. Step 2: Convert to fraction form
    309,334.36/426,916.84 = 173,405.04/x
  3. Step 3: Cross multiply
    309,334.36x = 426,916.84 × 173,405.04
  4. Step 4: Simplify right side
    309,334.36x = 74,029,531,716.87
  5. Step 5: Solve for x
    x = 74,029,531,716.87/309,334.36
  6. Step 6: Final answer
    x = 239,318.81

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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.