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Finding the Fourth Proportional to 512,020.80, 768,031.20 and 179,630.40

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Solution

The fourth proportional to 512,020.80, 768,031.20 and 179,630.40 is: 269,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,020.80 : 768,031.20 = 179,630.40 : x
  2. Step 2: Convert to fraction form
    512,020.80/768,031.20 = 179,630.40/x
  3. Step 3: Cross multiply
    512,020.80x = 768,031.20 × 179,630.40
  4. Step 4: Simplify right side
    512,020.80x = 137,961,751,668.48
  5. Step 5: Solve for x
    x = 137,961,751,668.48/512,020.80
  6. Step 6: Final answer
    x = 269,445.60

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1.5x scale

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.