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Finding the Fourth Proportional to 921,334, 1,382,192.16 and 388,859.44

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Solution

The fourth proportional to 921,334, 1,382,192.16 and 388,859.44 is: 583,369.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,334 : 1,382,192.16 = 388,859.44 : x
  2. Step 2: Convert to fraction form
    921,334/1,382,192.16 = 388,859.44/x
  3. Step 3: Cross multiply
    921,334x = 1,382,192.16 × 388,859.44
  4. Step 4: Simplify right side
    921,334x = 537,478,469,309.99
  5. Step 5: Solve for x
    x = 537,478,469,309.99/921,334
  6. Step 6: Final answer
    x = 583,369.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.