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Finding the Fourth Proportional to 328,639.90, 492,765.45 and 171,175.90

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Solution

The fourth proportional to 328,639.90, 492,765.45 and 171,175.90 is: 256,662.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,639.90 : 492,765.45 = 171,175.90 : x
  2. Step 2: Convert to fraction form
    328,639.90/492,765.45 = 171,175.90/x
  3. Step 3: Cross multiply
    328,639.90x = 492,765.45 × 171,175.90
  4. Step 4: Simplify right side
    328,639.90x = 84,349,569,392.66
  5. Step 5: Solve for x
    x = 84,349,569,392.66/328,639.90
  6. Step 6: Final answer
    x = 256,662.59

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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.