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Finding the Fourth Proportional to 415,347.20, 622,790.40 and 165,747.20

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Solution

The fourth proportional to 415,347.20, 622,790.40 and 165,747.20 is: 248,528.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,347.20 : 622,790.40 = 165,747.20 : x
  2. Step 2: Convert to fraction form
    415,347.20/622,790.40 = 165,747.20/x
  3. Step 3: Cross multiply
    415,347.20x = 622,790.40 × 165,747.20
  4. Step 4: Simplify right side
    415,347.20x = 103,225,764,986.88
  5. Step 5: Solve for x
    x = 103,225,764,986.88/415,347.20
  6. Step 6: Final answer
    x = 248,528.86

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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.