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Finding the Fourth Proportional to 644,145.62, 889,030.26 and 372,371.06

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Solution

The fourth proportional to 644,145.62, 889,030.26 and 372,371.06 is: 513,935.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,145.62 : 889,030.26 = 372,371.06 : x
  2. Step 2: Convert to fraction form
    644,145.62/889,030.26 = 372,371.06/x
  3. Step 3: Cross multiply
    644,145.62x = 889,030.26 × 372,371.06
  4. Step 4: Simplify right side
    644,145.62x = 331,049,140,288.28
  5. Step 5: Solve for x
    x = 331,049,140,288.28/644,145.62
  6. Step 6: Final answer
    x = 513,935.25

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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.