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Finding the Fourth Proportional to 479,216.80, 718,695.60 and 142,256.80

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Solution

The fourth proportional to 479,216.80, 718,695.60 and 142,256.80 is: 213,346.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,216.80 : 718,695.60 = 142,256.80 : x
  2. Step 2: Convert to fraction form
    479,216.80/718,695.60 = 142,256.80/x
  3. Step 3: Cross multiply
    479,216.80x = 718,695.60 × 142,256.80
  4. Step 4: Simplify right side
    479,216.80x = 102,239,336,230.08
  5. Step 5: Solve for x
    x = 102,239,336,230.08/479,216.80
  6. Step 6: Final answer
    x = 213,346.73

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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.