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Finding the Fourth Proportional to 644,153.05, 889,040.60 and 372,378.51

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Solution

The fourth proportional to 644,153.05, 889,040.60 and 372,378.51 is: 513,945.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,153.05 : 889,040.60 = 372,378.51 : x
  2. Step 2: Convert to fraction form
    644,153.05/889,040.60 = 372,378.51/x
  3. Step 3: Cross multiply
    644,153.05x = 889,040.60 × 372,378.51
  4. Step 4: Simplify right side
    644,153.05x = 331,059,609,692.66
  5. Step 5: Solve for x
    x = 331,059,609,692.66/644,153.05
  6. Step 6: Final answer
    x = 513,945.58

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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.