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Finding the Fourth Proportional to 343,614.70, 515,622.98 and 143,918.36

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Solution

The fourth proportional to 343,614.70, 515,622.98 and 143,918.36 is: 215,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,614.70 : 515,622.98 = 143,918.36 : x
  2. Step 2: Convert to fraction form
    343,614.70/515,622.98 = 143,918.36/x
  3. Step 3: Cross multiply
    343,614.70x = 515,622.98 × 143,918.36
  4. Step 4: Simplify right side
    343,614.70x = 74,207,613,375.18
  5. Step 5: Solve for x
    x = 74,207,613,375.18/343,614.70
  6. Step 6: Final answer
    x = 215,961.70

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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.