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Finding the Fourth Proportional to 290,739.66, 436,117.68 and 80,377.58

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Solution

The fourth proportional to 290,739.66, 436,117.68 and 80,377.58 is: 120,568.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,739.66 : 436,117.68 = 80,377.58 : x
  2. Step 2: Convert to fraction form
    290,739.66/436,117.68 = 80,377.58/x
  3. Step 3: Cross multiply
    290,739.66x = 436,117.68 × 80,377.58
  4. Step 4: Simplify right side
    290,739.66x = 35,054,081,533.03
  5. Step 5: Solve for x
    x = 35,054,081,533.03/290,739.66
  6. Step 6: Final answer
    x = 120,568.63

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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.