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Finding the Fourth Proportional to 876,629.20, 1,314,943.80 and 856,946.20

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Solution

The fourth proportional to 876,629.20, 1,314,943.80 and 856,946.20 is: 1,285,419.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,629.20 : 1,314,943.80 = 856,946.20 : x
  2. Step 2: Convert to fraction form
    876,629.20/1,314,943.80 = 856,946.20/x
  3. Step 3: Cross multiply
    876,629.20x = 1,314,943.80 × 856,946.20
  4. Step 4: Simplify right side
    876,629.20x = 1,126,836,092,623.56
  5. Step 5: Solve for x
    x = 1,126,836,092,623.56/876,629.20
  6. Step 6: Final answer
    x = 1,285,419.30

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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.