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Finding the Fourth Proportional to 911,969.43, 1,368,230.94 and 485,432.67

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Solution

The fourth proportional to 911,969.43, 1,368,230.94 and 485,432.67 is: 728,296.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,969.43 : 1,368,230.94 = 485,432.67 : x
  2. Step 2: Convert to fraction form
    911,969.43/1,368,230.94 = 485,432.67/x
  3. Step 3: Cross multiply
    911,969.43x = 1,368,230.94 × 485,432.67
  4. Step 4: Simplify right side
    911,969.43x = 664,183,999,663.53
  5. Step 5: Solve for x
    x = 664,183,999,663.53/911,969.43
  6. Step 6: Final answer
    x = 728,296.34

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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.