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Finding the Fourth Proportional to 644,724.48, 889,667.70 and 372,810

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Solution

The fourth proportional to 644,724.48, 889,667.70 and 372,810 is: 514,447.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,724.48 : 889,667.70 = 372,810 : x
  2. Step 2: Convert to fraction form
    644,724.48/889,667.70 = 372,810/x
  3. Step 3: Cross multiply
    644,724.48x = 889,667.70 × 372,810
  4. Step 4: Simplify right side
    644,724.48x = 331,677,015,237
  5. Step 5: Solve for x
    x = 331,677,015,237/644,724.48
  6. Step 6: Final answer
    x = 514,447.68

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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.