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Finding the Fourth Proportional to 479,239.80, 718,736.64 and 142,200.74

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Solution

The fourth proportional to 479,239.80, 718,736.64 and 142,200.74 is: 213,264.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,239.80 : 718,736.64 = 142,200.74 : x
  2. Step 2: Convert to fraction form
    479,239.80/718,736.64 = 142,200.74/x
  3. Step 3: Cross multiply
    479,239.80x = 718,736.64 × 142,200.74
  4. Step 4: Simplify right side
    479,239.80x = 102,204,878,479.43
  5. Step 5: Solve for x
    x = 102,204,878,479.43/479,239.80
  6. Step 6: Final answer
    x = 213,264.59

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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.