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Finding the Fourth Proportional to 485,601.10, 728,611.80 and 260,699.14

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Solution

The fourth proportional to 485,601.10, 728,611.80 and 260,699.14 is: 391,161.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,601.10 : 728,611.80 = 260,699.14 : x
  2. Step 2: Convert to fraction form
    485,601.10/728,611.80 = 260,699.14/x
  3. Step 3: Cross multiply
    485,601.10x = 728,611.80 × 260,699.14
  4. Step 4: Simplify right side
    485,601.10x = 189,948,469,653.85
  5. Step 5: Solve for x
    x = 189,948,469,653.85/485,601.10
  6. Step 6: Final answer
    x = 391,161.53

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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.