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Finding the Fourth Proportional to 911,995.20, 1,367,992.80 and 863,006.40

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Solution

The fourth proportional to 911,995.20, 1,367,992.80 and 863,006.40 is: 1,294,509.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,995.20 : 1,367,992.80 = 863,006.40 : x
  2. Step 2: Convert to fraction form
    911,995.20/1,367,992.80 = 863,006.40/x
  3. Step 3: Cross multiply
    911,995.20x = 1,367,992.80 × 863,006.40
  4. Step 4: Simplify right side
    911,995.20x = 1,180,586,541,553.92
  5. Step 5: Solve for x
    x = 1,180,586,541,553.92/911,995.20
  6. Step 6: Final answer
    x = 1,294,509.60

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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.