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Finding the Fourth Proportional to 644,504.19, 889,317.05 and 372,519.69

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Solution

The fourth proportional to 644,504.19, 889,317.05 and 372,519.69 is: 514,020.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,504.19 : 889,317.05 = 372,519.69 : x
  2. Step 2: Convert to fraction form
    644,504.19/889,317.05 = 372,519.69/x
  3. Step 3: Cross multiply
    644,504.19x = 889,317.05 × 372,519.69
  4. Step 4: Simplify right side
    644,504.19x = 331,288,111,777.72
  5. Step 5: Solve for x
    x = 331,288,111,777.72/644,504.19
  6. Step 6: Final answer
    x = 514,020.11

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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.