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Finding the Fourth Proportional to 309,381.84, 426,912.71 and 171,557.30

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Solution

The fourth proportional to 309,381.84, 426,912.71 and 171,557.30 is: 236,730.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,381.84 : 426,912.71 = 171,557.30 : x
  2. Step 2: Convert to fraction form
    309,381.84/426,912.71 = 171,557.30/x
  3. Step 3: Cross multiply
    309,381.84x = 426,912.71 × 171,557.30
  4. Step 4: Simplify right side
    309,381.84x = 73,239,992,072.78
  5. Step 5: Solve for x
    x = 73,239,992,072.78/309,381.84
  6. Step 6: Final answer
    x = 236,730.09

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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.