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Finding the Fourth Proportional to 767,672.58, 1,059,390 and 428,162.70

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Solution

The fourth proportional to 767,672.58, 1,059,390 and 428,162.70 is: 590,865.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    767,672.58 : 1,059,390 = 428,162.70 : x
  2. Step 2: Convert to fraction form
    767,672.58/1,059,390 = 428,162.70/x
  3. Step 3: Cross multiply
    767,672.58x = 1,059,390 × 428,162.70
  4. Step 4: Simplify right side
    767,672.58x = 453,591,282,753
  5. Step 5: Solve for x
    x = 453,591,282,753/767,672.58
  6. Step 6: Final answer
    x = 590,865.55

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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.