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Finding the Fourth Proportional to 326,048.30, 489,072.45 and 136,475.90

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Solution

The fourth proportional to 326,048.30, 489,072.45 and 136,475.90 is: 204,713.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,048.30 : 489,072.45 = 136,475.90 : x
  2. Step 2: Convert to fraction form
    326,048.30/489,072.45 = 136,475.90/x
  3. Step 3: Cross multiply
    326,048.30x = 489,072.45 × 136,475.90
  4. Step 4: Simplify right side
    326,048.30x = 66,746,602,778.96
  5. Step 5: Solve for x
    x = 66,746,602,778.96/326,048.30
  6. Step 6: Final answer
    x = 204,713.85

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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.