Home / 644,433.37-889,200.79-372,401.55

Finding the Fourth Proportional to 644,433.37, 889,200.79 and 372,401.55

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Solution

The fourth proportional to 644,433.37, 889,200.79 and 372,401.55 is: 513,846.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,433.37 : 889,200.79 = 372,401.55 : x
  2. Step 2: Convert to fraction form
    644,433.37/889,200.79 = 372,401.55/x
  3. Step 3: Cross multiply
    644,433.37x = 889,200.79 × 372,401.55
  4. Step 4: Simplify right side
    644,433.37x = 331,139,751,526.22
  5. Step 5: Solve for x
    x = 331,139,751,526.22/644,433.37
  6. Step 6: Final answer
    x = 513,846.38

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Double scale
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Similar ratio
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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.