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Finding the Fourth Proportional to 721,765.45, 995,968.84 and 431,319.37

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Solution

The fourth proportional to 721,765.45, 995,968.84 and 431,319.37 is: 595,180.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,765.45 : 995,968.84 = 431,319.37 : x
  2. Step 2: Convert to fraction form
    721,765.45/995,968.84 = 431,319.37/x
  3. Step 3: Cross multiply
    721,765.45x = 995,968.84 × 431,319.37
  4. Step 4: Simplify right side
    721,765.45x = 429,580,652,608.43
  5. Step 5: Solve for x
    x = 429,580,652,608.43/721,765.45
  6. Step 6: Final answer
    x = 595,180.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.