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Finding the Fourth Proportional to 644,390.67, 889,160.27 and 372,406.04

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Solution

The fourth proportional to 644,390.67, 889,160.27 and 372,406.04 is: 513,863.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,390.67 : 889,160.27 = 372,406.04 : x
  2. Step 2: Convert to fraction form
    644,390.67/889,160.27 = 372,406.04/x
  3. Step 3: Cross multiply
    644,390.67x = 889,160.27 × 372,406.04
  4. Step 4: Simplify right side
    644,390.67x = 331,128,658,928.21
  5. Step 5: Solve for x
    x = 331,128,658,928.21/644,390.67
  6. Step 6: Final answer
    x = 513,863.21

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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.