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Finding the Fourth Proportional to 439,685.91, 659,540.22 and 119,840.40

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Solution

The fourth proportional to 439,685.91, 659,540.22 and 119,840.40 is: 179,763.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,685.91 : 659,540.22 = 119,840.40 : x
  2. Step 2: Convert to fraction form
    439,685.91/659,540.22 = 119,840.40/x
  3. Step 3: Cross multiply
    439,685.91x = 659,540.22 × 119,840.40
  4. Step 4: Simplify right side
    439,685.91x = 79,039,563,780.89
  5. Step 5: Solve for x
    x = 79,039,563,780.89/439,685.91
  6. Step 6: Final answer
    x = 179,763.69

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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.