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Finding the Fourth Proportional to 328,143.90, 492,217.86 and 91,488.62

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Solution

The fourth proportional to 328,143.90, 492,217.86 and 91,488.62 is: 137,233.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,143.90 : 492,217.86 = 91,488.62 : x
  2. Step 2: Convert to fraction form
    328,143.90/492,217.86 = 91,488.62/x
  3. Step 3: Cross multiply
    328,143.90x = 492,217.86 × 91,488.62
  4. Step 4: Simplify right side
    328,143.90x = 45,032,332,750.75
  5. Step 5: Solve for x
    x = 45,032,332,750.75/328,143.90
  6. Step 6: Final answer
    x = 137,233.49

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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.