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Finding the Fourth Proportional to 290,711.20, 436,066.80 and 273,200.80

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Solution

The fourth proportional to 290,711.20, 436,066.80 and 273,200.80 is: 409,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,711.20 : 436,066.80 = 273,200.80 : x
  2. Step 2: Convert to fraction form
    290,711.20/436,066.80 = 273,200.80/x
  3. Step 3: Cross multiply
    290,711.20x = 436,066.80 × 273,200.80
  4. Step 4: Simplify right side
    290,711.20x = 119,133,798,613.44
  5. Step 5: Solve for x
    x = 119,133,798,613.44/290,711.20
  6. Step 6: Final answer
    x = 409,801.20

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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.