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Finding the Fourth Proportional to 413,743.60, 620,615.40 and 147,512.80

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Solution

The fourth proportional to 413,743.60, 620,615.40 and 147,512.80 is: 221,269.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,743.60 : 620,615.40 = 147,512.80 : x
  2. Step 2: Convert to fraction form
    413,743.60/620,615.40 = 147,512.80/x
  3. Step 3: Cross multiply
    413,743.60x = 620,615.40 × 147,512.80
  4. Step 4: Simplify right side
    413,743.60x = 91,548,715,377.12
  5. Step 5: Solve for x
    x = 91,548,715,377.12/413,743.60
  6. Step 6: Final answer
    x = 221,269.20

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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.