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Finding the Fourth Proportional to 328,072.60, 492,048.15 and 91,366.30

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Solution

The fourth proportional to 328,072.60, 492,048.15 and 91,366.30 is: 137,032.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,072.60 : 492,048.15 = 91,366.30 : x
  2. Step 2: Convert to fraction form
    328,072.60/492,048.15 = 91,366.30/x
  3. Step 3: Cross multiply
    328,072.60x = 492,048.15 × 91,366.30
  4. Step 4: Simplify right side
    328,072.60x = 44,956,618,887.35
  5. Step 5: Solve for x
    x = 44,956,618,887.35/328,072.60
  6. Step 6: Final answer
    x = 137,032.53

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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.