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Finding the Fourth Proportional to 343,894.20, 515,914.20 and 103,988.40

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Solution

The fourth proportional to 343,894.20, 515,914.20 and 103,988.40 is: 156,004.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,894.20 : 515,914.20 = 103,988.40 : x
  2. Step 2: Convert to fraction form
    343,894.20/515,914.20 = 103,988.40/x
  3. Step 3: Cross multiply
    343,894.20x = 515,914.20 × 103,988.40
  4. Step 4: Simplify right side
    343,894.20x = 53,649,092,195.28
  5. Step 5: Solve for x
    x = 53,649,092,195.28/343,894.20
  6. Step 6: Final answer
    x = 156,004.64

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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.