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Finding the Fourth Proportional to 644,613.09, 889,513.91 and 372,698.43

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Solution

The fourth proportional to 644,613.09, 889,513.91 and 372,698.43 is: 514,293.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,613.09 : 889,513.91 = 372,698.43 : x
  2. Step 2: Convert to fraction form
    644,613.09/889,513.91 = 372,698.43/x
  3. Step 3: Cross multiply
    644,613.09x = 889,513.91 × 372,698.43
  4. Step 4: Simplify right side
    644,613.09x = 331,520,431,409.10
  5. Step 5: Solve for x
    x = 331,520,431,409.10/644,613.09
  6. Step 6: Final answer
    x = 514,293.67

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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.