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Finding the Fourth Proportional to 911,455.20, 1,363,246.20 and 769,737.60

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Solution

The fourth proportional to 911,455.20, 1,363,246.20 and 769,737.60 is: 1,151,281.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,455.20 : 1,363,246.20 = 769,737.60 : x
  2. Step 2: Convert to fraction form
    911,455.20/1,363,246.20 = 769,737.60/x
  3. Step 3: Cross multiply
    911,455.20x = 1,363,246.20 × 769,737.60
  4. Step 4: Simplify right side
    911,455.20x = 1,049,341,858,197.12
  5. Step 5: Solve for x
    x = 1,049,341,858,197.12/911,455.20
  6. Step 6: Final answer
    x = 1,151,281.88

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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.