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Finding the Fourth Proportional to 768,110.62, 1,059,992 and 428,578.88

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Solution

The fourth proportional to 768,110.62, 1,059,992 and 428,578.88 is: 591,438.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,110.62 : 1,059,992 = 428,578.88 : x
  2. Step 2: Convert to fraction form
    768,110.62/1,059,992 = 428,578.88/x
  3. Step 3: Cross multiply
    768,110.62x = 1,059,992 × 428,578.88
  4. Step 4: Simplify right side
    768,110.62x = 454,290,184,168.96
  5. Step 5: Solve for x
    x = 454,290,184,168.96/768,110.62
  6. Step 6: Final answer
    x = 591,438.49

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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.