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Finding the Fourth Proportional to 308,625.70, 425,942.70 and 172,667.20

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Solution

The fourth proportional to 308,625.70, 425,942.70 and 172,667.20 is: 238,302.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,625.70 : 425,942.70 = 172,667.20 : x
  2. Step 2: Convert to fraction form
    308,625.70/425,942.70 = 172,667.20/x
  3. Step 3: Cross multiply
    308,625.70x = 425,942.70 × 172,667.20
  4. Step 4: Simplify right side
    308,625.70x = 73,546,333,369.44
  5. Step 5: Solve for x
    x = 73,546,333,369.44/308,625.70
  6. Step 6: Final answer
    x = 238,302.69

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1.5x scale

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.