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Finding the Fourth Proportional to 644,823.72, 889,838 and 369,172.36

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Solution

The fourth proportional to 644,823.72, 889,838 and 369,172.36 is: 509,447.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,823.72 : 889,838 = 369,172.36 : x
  2. Step 2: Convert to fraction form
    644,823.72/889,838 = 369,172.36/x
  3. Step 3: Cross multiply
    644,823.72x = 889,838 × 369,172.36
  4. Step 4: Simplify right side
    644,823.72x = 328,503,594,477.68
  5. Step 5: Solve for x
    x = 328,503,594,477.68/644,823.72
  6. Step 6: Final answer
    x = 509,447.13

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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.