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Finding the Fourth Proportional to 644,696.62, 889,629.24 and 372,782.13

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Solution

The fourth proportional to 644,696.62, 889,629.24 and 372,782.13 is: 514,409.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,696.62 : 889,629.24 = 372,782.13 : x
  2. Step 2: Convert to fraction form
    644,696.62/889,629.24 = 372,782.13/x
  3. Step 3: Cross multiply
    644,696.62x = 889,629.24 × 372,782.13
  4. Step 4: Simplify right side
    644,696.62x = 331,637,882,997.48
  5. Step 5: Solve for x
    x = 331,637,882,997.48/644,696.62
  6. Step 6: Final answer
    x = 514,409.22

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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.