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Finding the Fourth Proportional to 290,838.30, 436,267.17 and 80,458.62

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Solution

The fourth proportional to 290,838.30, 436,267.17 and 80,458.62 is: 120,690.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,838.30 : 436,267.17 = 80,458.62 : x
  2. Step 2: Convert to fraction form
    290,838.30/436,267.17 = 80,458.62/x
  3. Step 3: Cross multiply
    290,838.30x = 436,267.17 × 80,458.62
  4. Step 4: Simplify right side
    290,838.30x = 35,101,454,449.51
  5. Step 5: Solve for x
    x = 35,101,454,449.51/290,838.30
  6. Step 6: Final answer
    x = 120,690.62

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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.