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Finding the Fourth Proportional to 290,819.70, 435,999.15 and 159,491.70

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Solution

The fourth proportional to 290,819.70, 435,999.15 and 159,491.70 is: 239,111.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,819.70 : 435,999.15 = 159,491.70 : x
  2. Step 2: Convert to fraction form
    290,819.70/435,999.15 = 159,491.70/x
  3. Step 3: Cross multiply
    290,819.70x = 435,999.15 × 159,491.70
  4. Step 4: Simplify right side
    290,819.70x = 69,538,245,632.06
  5. Step 5: Solve for x
    x = 69,538,245,632.06/290,819.70
  6. Step 6: Final answer
    x = 239,111.19

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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.