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Finding the Fourth Proportional to 623,311.40, 936,003.90 and 343,029.80

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Solution

The fourth proportional to 623,311.40, 936,003.90 and 343,029.80 is: 515,115.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,311.40 : 936,003.90 = 343,029.80 : x
  2. Step 2: Convert to fraction form
    623,311.40/936,003.90 = 343,029.80/x
  3. Step 3: Cross multiply
    623,311.40x = 936,003.90 × 343,029.80
  4. Step 4: Simplify right side
    623,311.40x = 321,077,230,616.22
  5. Step 5: Solve for x
    x = 321,077,230,616.22/623,311.40
  6. Step 6: Final answer
    x = 515,115.29

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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.