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Finding the Fourth Proportional to 415,095.60, 621,768.60 and 345,111.60

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Solution

The fourth proportional to 415,095.60, 621,768.60 and 345,111.60 is: 516,940.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,095.60 : 621,768.60 = 345,111.60 : x
  2. Step 2: Convert to fraction form
    415,095.60/621,768.60 = 345,111.60/x
  3. Step 3: Cross multiply
    415,095.60x = 621,768.60 × 345,111.60
  4. Step 4: Simplify right side
    415,095.60x = 214,579,556,375.76
  5. Step 5: Solve for x
    x = 214,579,556,375.76/415,095.60
  6. Step 6: Final answer
    x = 516,940.09

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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.