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Finding the Fourth Proportional to 768,396.21, 1,060,288.97 and 428,878.77

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Solution

The fourth proportional to 768,396.21, 1,060,288.97 and 428,878.77 is: 591,798.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,396.21 : 1,060,288.97 = 428,878.77 : x
  2. Step 2: Convert to fraction form
    768,396.21/1,060,288.97 = 428,878.77/x
  3. Step 3: Cross multiply
    768,396.21x = 1,060,288.97 × 428,878.77
  4. Step 4: Simplify right side
    768,396.21x = 454,735,427,153.77
  5. Step 5: Solve for x
    x = 454,735,427,153.77/768,396.21
  6. Step 6: Final answer
    x = 591,798.11

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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.