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Finding the Fourth Proportional to 644,615.09, 889,516.66 and 372,700.43

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Solution

The fourth proportional to 644,615.09, 889,516.66 and 372,700.43 is: 514,296.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,615.09 : 889,516.66 = 372,700.43 : x
  2. Step 2: Convert to fraction form
    644,615.09/889,516.66 = 372,700.43/x
  3. Step 3: Cross multiply
    644,615.09x = 889,516.66 × 372,700.43
  4. Step 4: Simplify right side
    644,615.09x = 331,523,241,674.16
  5. Step 5: Solve for x
    x = 331,523,241,674.16/644,615.09
  6. Step 6: Final answer
    x = 514,296.43

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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.