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Finding the Fourth Proportional to 270,469.20, 405,703.80 and 208,261.20

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Solution

The fourth proportional to 270,469.20, 405,703.80 and 208,261.20 is: 312,391.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,469.20 : 405,703.80 = 208,261.20 : x
  2. Step 2: Convert to fraction form
    270,469.20/405,703.80 = 208,261.20/x
  3. Step 3: Cross multiply
    270,469.20x = 405,703.80 × 208,261.20
  4. Step 4: Simplify right side
    270,469.20x = 84,492,360,232.56
  5. Step 5: Solve for x
    x = 84,492,360,232.56/270,469.20
  6. Step 6: Final answer
    x = 312,391.80

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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.