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Finding the Fourth Proportional to 389,589.90, 584,410.80 and 136,839.66

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Solution

The fourth proportional to 389,589.90, 584,410.80 and 136,839.66 is: 205,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,589.90 : 584,410.80 = 136,839.66 : x
  2. Step 2: Convert to fraction form
    389,589.90/584,410.80 = 136,839.66/x
  3. Step 3: Cross multiply
    389,589.90x = 584,410.80 × 136,839.66
  4. Step 4: Simplify right side
    389,589.90x = 79,970,575,172.33
  5. Step 5: Solve for x
    x = 79,970,575,172.33/389,589.90
  6. Step 6: Final answer
    x = 205,268.60

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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.