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Finding the Fourth Proportional to 290,634.90, 435,806.55 and 132,684.90

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Solution

The fourth proportional to 290,634.90, 435,806.55 and 132,684.90 is: 198,960.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,634.90 : 435,806.55 = 132,684.90 : x
  2. Step 2: Convert to fraction form
    290,634.90/435,806.55 = 132,684.90/x
  3. Step 3: Cross multiply
    290,634.90x = 435,806.55 × 132,684.90
  4. Step 4: Simplify right side
    290,634.90x = 57,824,948,506.10
  5. Step 5: Solve for x
    x = 57,824,948,506.10/290,634.90
  6. Step 6: Final answer
    x = 198,960.79

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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.