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Finding the Fourth Proportional to 326,617.14, 489,735 and 126,703.92

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Solution

The fourth proportional to 326,617.14, 489,735 and 126,703.92 is: 189,981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,617.14 : 489,735 = 126,703.92 : x
  2. Step 2: Convert to fraction form
    326,617.14/489,735 = 126,703.92/x
  3. Step 3: Cross multiply
    326,617.14x = 489,735 × 126,703.92
  4. Step 4: Simplify right side
    326,617.14x = 62,051,344,261.20
  5. Step 5: Solve for x
    x = 62,051,344,261.20/326,617.14
  6. Step 6: Final answer
    x = 189,981.90

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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.