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Finding the Fourth Proportional to 512,627.40, 768,941.10 and 138,650.40

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Solution

The fourth proportional to 512,627.40, 768,941.10 and 138,650.40 is: 207,975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,627.40 : 768,941.10 = 138,650.40 : x
  2. Step 2: Convert to fraction form
    512,627.40/768,941.10 = 138,650.40/x
  3. Step 3: Cross multiply
    512,627.40x = 768,941.10 × 138,650.40
  4. Step 4: Simplify right side
    512,627.40x = 106,613,991,091.44
  5. Step 5: Solve for x
    x = 106,613,991,091.44/512,627.40
  6. Step 6: Final answer
    x = 207,975.60

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Similar ratio
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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.