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Finding the Fourth Proportional to 270,468.78, 405,344.79 and 143,836.35

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Solution

The fourth proportional to 270,468.78, 405,344.79 and 143,836.35 is: 215,563.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,468.78 : 405,344.79 = 143,836.35 : x
  2. Step 2: Convert to fraction form
    270,468.78/405,344.79 = 143,836.35/x
  3. Step 3: Cross multiply
    270,468.78x = 405,344.79 × 143,836.35
  4. Step 4: Simplify right side
    270,468.78x = 58,303,315,085.12
  5. Step 5: Solve for x
    x = 58,303,315,085.12/270,468.78
  6. Step 6: Final answer
    x = 215,563.94

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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.