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Finding the Fourth Proportional to 343,698.66, 515,551.77 and 103,814.55

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Solution

The fourth proportional to 343,698.66, 515,551.77 and 103,814.55 is: 155,722.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,698.66 : 515,551.77 = 103,814.55 : x
  2. Step 2: Convert to fraction form
    343,698.66/515,551.77 = 103,814.55/x
  3. Step 3: Cross multiply
    343,698.66x = 515,551.77 × 103,814.55
  4. Step 4: Simplify right side
    343,698.66x = 53,521,775,004.25
  5. Step 5: Solve for x
    x = 53,521,775,004.25/343,698.66
  6. Step 6: Final answer
    x = 155,722.97

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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.