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Finding the Fourth Proportional to 479,218.80, 718,698.60 and 142,258.80

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Solution

The fourth proportional to 479,218.80, 718,698.60 and 142,258.80 is: 213,349.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,218.80 : 718,698.60 = 142,258.80 : x
  2. Step 2: Convert to fraction form
    479,218.80/718,698.60 = 142,258.80/x
  3. Step 3: Cross multiply
    479,218.80x = 718,698.60 × 142,258.80
  4. Step 4: Simplify right side
    479,218.80x = 102,241,200,397.68
  5. Step 5: Solve for x
    x = 102,241,200,397.68/479,218.80
  6. Step 6: Final answer
    x = 213,349.73

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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.