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Finding the Fourth Proportional to 415,089.80, 622,634.70 and 247,128.20

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Solution

The fourth proportional to 415,089.80, 622,634.70 and 247,128.20 is: 370,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,089.80 : 622,634.70 = 247,128.20 : x
  2. Step 2: Convert to fraction form
    415,089.80/622,634.70 = 247,128.20/x
  3. Step 3: Cross multiply
    415,089.80x = 622,634.70 × 247,128.20
  4. Step 4: Simplify right side
    415,089.80x = 153,870,592,668.54
  5. Step 5: Solve for x
    x = 153,870,592,668.54/415,089.80
  6. Step 6: Final answer
    x = 370,692.30

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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.