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Finding the Fourth Proportional to 480,765.91, 721,192.31 and 139,204.35

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Solution

The fourth proportional to 480,765.91, 721,192.31 and 139,204.35 is: 208,819.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,765.91 : 721,192.31 = 139,204.35 : x
  2. Step 2: Convert to fraction form
    480,765.91/721,192.31 = 139,204.35/x
  3. Step 3: Cross multiply
    480,765.91x = 721,192.31 × 139,204.35
  4. Step 4: Simplify right side
    480,765.91x = 100,393,109,099.98
  5. Step 5: Solve for x
    x = 100,393,109,099.98/480,765.91
  6. Step 6: Final answer
    x = 208,819.11

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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.