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Finding the Fourth Proportional to 328,513.62, 492,771.24 and 91,855.92

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Solution

The fourth proportional to 328,513.62, 492,771.24 and 91,855.92 is: 137,784.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,513.62 : 492,771.24 = 91,855.92 : x
  2. Step 2: Convert to fraction form
    328,513.62/492,771.24 = 91,855.92/x
  3. Step 3: Cross multiply
    328,513.62x = 492,771.24 × 91,855.92
  4. Step 4: Simplify right side
    328,513.62x = 45,263,955,599.74
  5. Step 5: Solve for x
    x = 45,263,955,599.74/328,513.62
  6. Step 6: Final answer
    x = 137,784.11

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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.