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Finding the Fourth Proportional to 308,651.48, 425,921.64 and 170,822.89

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Solution

The fourth proportional to 308,651.48, 425,921.64 and 170,822.89 is: 235,725.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,651.48 : 425,921.64 = 170,822.89 : x
  2. Step 2: Convert to fraction form
    308,651.48/425,921.64 = 170,822.89/x
  3. Step 3: Cross multiply
    308,651.48x = 425,921.64 × 170,822.89
  4. Step 4: Simplify right side
    308,651.48x = 72,757,163,328.73
  5. Step 5: Solve for x
    x = 72,757,163,328.73/308,651.48
  6. Step 6: Final answer
    x = 235,725.95

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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.