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Finding the Fourth Proportional to 479,398.38, 718,974.45 and 142,359.54

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Solution

The fourth proportional to 479,398.38, 718,974.45 and 142,359.54 is: 213,502.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,398.38 : 718,974.45 = 142,359.54 : x
  2. Step 2: Convert to fraction form
    479,398.38/718,974.45 = 142,359.54/x
  3. Step 3: Cross multiply
    479,398.38x = 718,974.45 × 142,359.54
  4. Step 4: Simplify right side
    479,398.38x = 102,352,871,973.75
  5. Step 5: Solve for x
    x = 102,352,871,973.75/479,398.38
  6. Step 6: Final answer
    x = 213,502.75

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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.