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Finding the Fourth Proportional to 290,815.28, 435,911.88 and 132,806.96

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Solution

The fourth proportional to 290,815.28, 435,911.88 and 132,806.96 is: 199,068.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,815.28 : 435,911.88 = 132,806.96 : x
  2. Step 2: Convert to fraction form
    290,815.28/435,911.88 = 132,806.96/x
  3. Step 3: Cross multiply
    290,815.28x = 435,911.88 × 132,806.96
  4. Step 4: Simplify right side
    290,815.28x = 57,892,131,610.68
  5. Step 5: Solve for x
    x = 57,892,131,610.68/290,815.28
  6. Step 6: Final answer
    x = 199,068.40

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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.