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Finding the Fourth Proportional to 328,462.36, 492,693.96 and 79,144.36

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Solution

The fourth proportional to 328,462.36, 492,693.96 and 79,144.36 is: 118,716.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,462.36 : 492,693.96 = 79,144.36 : x
  2. Step 2: Convert to fraction form
    328,462.36/492,693.96 = 79,144.36/x
  3. Step 3: Cross multiply
    328,462.36x = 492,693.96 × 79,144.36
  4. Step 4: Simplify right side
    328,462.36x = 38,993,948,140.07
  5. Step 5: Solve for x
    x = 38,993,948,140.07/328,462.36
  6. Step 6: Final answer
    x = 118,716.64

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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.