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Finding the Fourth Proportional to 1,362,976.28, 1,880,914.66 and 782,153.16

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Solution

The fourth proportional to 1,362,976.28, 1,880,914.66 and 782,153.16 is: 1,079,375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362,976.28 : 1,880,914.66 = 782,153.16 : x
  2. Step 2: Convert to fraction form
    1,362,976.28/1,880,914.66 = 782,153.16/x
  3. Step 3: Cross multiply
    1,362,976.28x = 1,880,914.66 × 782,153.16
  4. Step 4: Simplify right side
    1,362,976.28x = 1,471,163,336,000.51
  5. Step 5: Solve for x
    x = 1,471,163,336,000.51/1,362,976.28
  6. Step 6: Final answer
    x = 1,079,375.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.