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Finding the Fourth Proportional to 326,587.47, 489,912.18 and 126,923.28

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Solution

The fourth proportional to 326,587.47, 489,912.18 and 126,923.28 is: 190,396.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,587.47 : 489,912.18 = 126,923.28 : x
  2. Step 2: Convert to fraction form
    326,587.47/489,912.18 = 126,923.28/x
  3. Step 3: Cross multiply
    326,587.47x = 489,912.18 × 126,923.28
  4. Step 4: Simplify right side
    326,587.47x = 62,181,260,797.55
  5. Step 5: Solve for x
    x = 62,181,260,797.55/326,587.47
  6. Step 6: Final answer
    x = 190,396.96

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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.