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Finding the Fourth Proportional to 768,239.76, 1,060,171.74 and 428,707.92

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Solution

The fourth proportional to 768,239.76, 1,060,171.74 and 428,707.92 is: 591,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,239.76 : 1,060,171.74 = 428,707.92 : x
  2. Step 2: Convert to fraction form
    768,239.76/1,060,171.74 = 428,707.92/x
  3. Step 3: Cross multiply
    768,239.76x = 1,060,171.74 × 428,707.92
  4. Step 4: Simplify right side
    768,239.76x = 454,504,021,498.18
  5. Step 5: Solve for x
    x = 454,504,021,498.18/768,239.76
  6. Step 6: Final answer
    x = 591,617.42

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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.