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Finding the Fourth Proportional to 911,969.97, 1,368,023.72 and 272,223.18

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Solution

The fourth proportional to 911,969.97, 1,368,023.72 and 272,223.18 is: 408,355.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,969.97 : 1,368,023.72 = 272,223.18 : x
  2. Step 2: Convert to fraction form
    911,969.97/1,368,023.72 = 272,223.18/x
  3. Step 3: Cross multiply
    911,969.97x = 1,368,023.72 × 272,223.18
  4. Step 4: Simplify right side
    911,969.97x = 372,407,766,012.71
  5. Step 5: Solve for x
    x = 372,407,766,012.71/911,969.97
  6. Step 6: Final answer
    x = 408,355.29

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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.