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Finding the Fourth Proportional to 394,290.18, 591,448.59 and 109,987.70

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Solution

The fourth proportional to 394,290.18, 591,448.59 and 109,987.70 is: 164,985.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,290.18 : 591,448.59 = 109,987.70 : x
  2. Step 2: Convert to fraction form
    394,290.18/591,448.59 = 109,987.70/x
  3. Step 3: Cross multiply
    394,290.18x = 591,448.59 × 109,987.70
  4. Step 4: Simplify right side
    394,290.18x = 65,052,067,125.10
  5. Step 5: Solve for x
    x = 65,052,067,125.10/394,290.18
  6. Step 6: Final answer
    x = 164,985.26

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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.