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Finding the Fourth Proportional to 644,331.50, 889,125.42 and 372,417

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Solution

The fourth proportional to 644,331.50, 889,125.42 and 372,417 is: 513,905.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,331.50 : 889,125.42 = 372,417 : x
  2. Step 2: Convert to fraction form
    644,331.50/889,125.42 = 372,417/x
  3. Step 3: Cross multiply
    644,331.50x = 889,125.42 × 372,417
  4. Step 4: Simplify right side
    644,331.50x = 331,125,421,540.14
  5. Step 5: Solve for x
    x = 331,125,421,540.14/644,331.50
  6. Step 6: Final answer
    x = 513,905.38

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1.5x scale

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.