Home / 644,378.11-889,143.05-372,393.53

Finding the Fourth Proportional to 644,378.11, 889,143.05 and 372,393.53

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Solution

The fourth proportional to 644,378.11, 889,143.05 and 372,393.53 is: 513,846.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,378.11 : 889,143.05 = 372,393.53 : x
  2. Step 2: Convert to fraction form
    644,378.11/889,143.05 = 372,393.53/x
  3. Step 3: Cross multiply
    644,378.11x = 889,143.05 × 372,393.53
  4. Step 4: Simplify right side
    644,378.11x = 331,111,119,064.47
  5. Step 5: Solve for x
    x = 331,111,119,064.47/644,378.11
  6. Step 6: Final answer
    x = 513,846.01

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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.