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Finding the Fourth Proportional to 328,399, 492,598.62 and 79,081

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Solution

The fourth proportional to 328,399, 492,598.62 and 79,081 is: 118,621.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,399 : 492,598.62 = 79,081 : x
  2. Step 2: Convert to fraction form
    328,399/492,598.62 = 79,081/x
  3. Step 3: Cross multiply
    328,399x = 492,598.62 × 79,081
  4. Step 4: Simplify right side
    328,399x = 38,955,191,468.22
  5. Step 5: Solve for x
    x = 38,955,191,468.22/328,399
  6. Step 6: Final answer
    x = 118,621.53

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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.