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Finding the Fourth Proportional to 328,008.78, 492,041.37 and 91,351.47

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Solution

The fourth proportional to 328,008.78, 492,041.37 and 91,351.47 is: 137,035.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,008.78 : 492,041.37 = 91,351.47 : x
  2. Step 2: Convert to fraction form
    328,008.78/492,041.37 = 91,351.47/x
  3. Step 3: Cross multiply
    328,008.78x = 492,041.37 × 91,351.47
  4. Step 4: Simplify right side
    328,008.78x = 44,948,702,450.31
  5. Step 5: Solve for x
    x = 44,948,702,450.31/328,008.78
  6. Step 6: Final answer
    x = 137,035.06

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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.