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Finding the Fourth Proportional to 343,890.60, 515,835.90 and 238,914.60

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Solution

The fourth proportional to 343,890.60, 515,835.90 and 238,914.60 is: 358,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,890.60 : 515,835.90 = 238,914.60 : x
  2. Step 2: Convert to fraction form
    343,890.60/515,835.90 = 238,914.60/x
  3. Step 3: Cross multiply
    343,890.60x = 515,835.90 × 238,914.60
  4. Step 4: Simplify right side
    343,890.60x = 123,240,727,714.14
  5. Step 5: Solve for x
    x = 123,240,727,714.14/343,890.60
  6. Step 6: Final answer
    x = 358,371.90

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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.