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Finding the Fourth Proportional to 876,647.80, 1,313,999.70 and 343,991.80

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Solution

The fourth proportional to 876,647.80, 1,313,999.70 and 343,991.80 is: 515,606.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,647.80 : 1,313,999.70 = 343,991.80 : x
  2. Step 2: Convert to fraction form
    876,647.80/1,313,999.70 = 343,991.80/x
  3. Step 3: Cross multiply
    876,647.80x = 1,313,999.70 × 343,991.80
  4. Step 4: Simplify right side
    876,647.80x = 452,005,122,002.46
  5. Step 5: Solve for x
    x = 452,005,122,002.46/876,647.80
  6. Step 6: Final answer
    x = 515,606.29

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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.