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Finding the Fourth Proportional to 245,287.96, 338,589.90 and 143,346.64

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Solution

The fourth proportional to 245,287.96, 338,589.90 and 143,346.64 is: 197,872.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,287.96 : 338,589.90 = 143,346.64 : x
  2. Step 2: Convert to fraction form
    245,287.96/338,589.90 = 143,346.64/x
  3. Step 3: Cross multiply
    245,287.96x = 338,589.90 × 143,346.64
  4. Step 4: Simplify right side
    245,287.96x = 48,535,724,502.94
  5. Step 5: Solve for x
    x = 48,535,724,502.94/245,287.96
  6. Step 6: Final answer
    x = 197,872.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.