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Finding the Fourth Proportional to 290,373.66, 435,481.92 and 79,961.58

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Solution

The fourth proportional to 290,373.66, 435,481.92 and 79,961.58 is: 119,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,373.66 : 435,481.92 = 79,961.58 : x
  2. Step 2: Convert to fraction form
    290,373.66/435,481.92 = 79,961.58/x
  3. Step 3: Cross multiply
    290,373.66x = 435,481.92 × 79,961.58
  4. Step 4: Simplify right side
    290,373.66x = 34,821,822,384.63
  5. Step 5: Solve for x
    x = 34,821,822,384.63/290,373.66
  6. Step 6: Final answer
    x = 119,920.73

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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.