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Finding the Fourth Proportional to 768,249.76, 1,060,057.88 and 428,717.20

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Solution

The fourth proportional to 768,249.76, 1,060,057.88 and 428,717.20 is: 591,558.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,249.76 : 1,060,057.88 = 428,717.20 : x
  2. Step 2: Convert to fraction form
    768,249.76/1,060,057.88 = 428,717.20/x
  3. Step 3: Cross multiply
    768,249.76x = 1,060,057.88 × 428,717.20
  4. Step 4: Simplify right side
    768,249.76x = 454,465,046,151.54
  5. Step 5: Solve for x
    x = 454,465,046,151.54/768,249.76
  6. Step 6: Final answer
    x = 591,558.98

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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.