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Finding the Fourth Proportional to 911,425.80, 1,367,009.10 and 312,414.60

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Solution

The fourth proportional to 911,425.80, 1,367,009.10 and 312,414.60 is: 468,577.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,425.80 : 1,367,009.10 = 312,414.60 : x
  2. Step 2: Convert to fraction form
    911,425.80/1,367,009.10 = 312,414.60/x
  3. Step 3: Cross multiply
    911,425.80x = 1,367,009.10 × 312,414.60
  4. Step 4: Simplify right side
    911,425.80x = 427,073,601,172.86
  5. Step 5: Solve for x
    x = 427,073,601,172.86/911,425.80
  6. Step 6: Final answer
    x = 468,577.48

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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.