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Finding the Fourth Proportional to 290,661.32, 435,987.66 and 80,294.60

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Solution

The fourth proportional to 290,661.32, 435,987.66 and 80,294.60 is: 120,440.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,661.32 : 435,987.66 = 80,294.60 : x
  2. Step 2: Convert to fraction form
    290,661.32/435,987.66 = 80,294.60/x
  3. Step 3: Cross multiply
    290,661.32x = 435,987.66 × 80,294.60
  4. Step 4: Simplify right side
    290,661.32x = 35,007,454,764.64
  5. Step 5: Solve for x
    x = 35,007,454,764.64/290,661.32
  6. Step 6: Final answer
    x = 120,440.71

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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.