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Finding the Fourth Proportional to 479,221.59, 718,709.37 and 142,182.51

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Solution

The fourth proportional to 479,221.59, 718,709.37 and 142,182.51 is: 213,237.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,221.59 : 718,709.37 = 142,182.51 : x
  2. Step 2: Convert to fraction form
    479,221.59/718,709.37 = 142,182.51/x
  3. Step 3: Cross multiply
    479,221.59x = 718,709.37 × 142,182.51
  4. Step 4: Simplify right side
    479,221.59x = 102,187,900,674.75
  5. Step 5: Solve for x
    x = 102,187,900,674.75/479,221.59
  6. Step 6: Final answer
    x = 213,237.26

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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.