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Finding the Fourth Proportional to 308,468.91, 425,669.40 and 170,639.58

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Solution

The fourth proportional to 308,468.91, 425,669.40 and 170,639.58 is: 235,472.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,468.91 : 425,669.40 = 170,639.58 : x
  2. Step 2: Convert to fraction form
    308,468.91/425,669.40 = 170,639.58/x
  3. Step 3: Cross multiply
    308,468.91x = 425,669.40 × 170,639.58
  4. Step 4: Simplify right side
    308,468.91x = 72,636,047,634.85
  5. Step 5: Solve for x
    x = 72,636,047,634.85/308,468.91
  6. Step 6: Final answer
    x = 235,472.83

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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.