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Finding the Fourth Proportional to 290,988, 436,482.48 and 80,626.44

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Solution

The fourth proportional to 290,988, 436,482.48 and 80,626.44 is: 120,939.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,988 : 436,482.48 = 80,626.44 : x
  2. Step 2: Convert to fraction form
    290,988/436,482.48 = 80,626.44/x
  3. Step 3: Cross multiply
    290,988x = 436,482.48 × 80,626.44
  4. Step 4: Simplify right side
    290,988x = 35,192,028,484.77
  5. Step 5: Solve for x
    x = 35,192,028,484.77/290,988
  6. Step 6: Final answer
    x = 120,939.79

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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.