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Finding the Fourth Proportional to 328,398, 492,597.12 and 79,080

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Solution

The fourth proportional to 328,398, 492,597.12 and 79,080 is: 118,620.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,398 : 492,597.12 = 79,080 : x
  2. Step 2: Convert to fraction form
    328,398/492,597.12 = 79,080/x
  3. Step 3: Cross multiply
    328,398x = 492,597.12 × 79,080
  4. Step 4: Simplify right side
    328,398x = 38,954,580,249.60
  5. Step 5: Solve for x
    x = 38,954,580,249.60/328,398
  6. Step 6: Final answer
    x = 118,620.03

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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.