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Finding the Fourth Proportional to 343,404.20, 515,106.30 and 231,429.80

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Solution

The fourth proportional to 343,404.20, 515,106.30 and 231,429.80 is: 347,144.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,404.20 : 515,106.30 = 231,429.80 : x
  2. Step 2: Convert to fraction form
    343,404.20/515,106.30 = 231,429.80/x
  3. Step 3: Cross multiply
    343,404.20x = 515,106.30 × 231,429.80
  4. Step 4: Simplify right side
    343,404.20x = 119,210,947,987.74
  5. Step 5: Solve for x
    x = 119,210,947,987.74/343,404.20
  6. Step 6: Final answer
    x = 347,144.70

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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.