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Finding the Fourth Proportional to 290,830.80, 436,246.20 and 133,366.80

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Solution

The fourth proportional to 290,830.80, 436,246.20 and 133,366.80 is: 200,050.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,830.80 : 436,246.20 = 133,366.80 : x
  2. Step 2: Convert to fraction form
    290,830.80/436,246.20 = 133,366.80/x
  3. Step 3: Cross multiply
    290,830.80x = 436,246.20 × 133,366.80
  4. Step 4: Simplify right side
    290,830.80x = 58,180,759,706.16
  5. Step 5: Solve for x
    x = 58,180,759,706.16/290,830.80
  6. Step 6: Final answer
    x = 200,050.20

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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.