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Finding the Fourth Proportional to 644,392.17, 889,162.34 and 372,407.54

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Solution

The fourth proportional to 644,392.17, 889,162.34 and 372,407.54 is: 513,865.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,392.17 : 889,162.34 = 372,407.54 : x
  2. Step 2: Convert to fraction form
    644,392.17/889,162.34 = 372,407.54/x
  3. Step 3: Cross multiply
    644,392.17x = 889,162.34 × 372,407.54
  4. Step 4: Simplify right side
    644,392.17x = 331,130,762,853.97
  5. Step 5: Solve for x
    x = 331,130,762,853.97/644,392.17
  6. Step 6: Final answer
    x = 513,865.28

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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.