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Finding the Fourth Proportional to 644,206.72, 889,135.84 and 372,286.08

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Solution

The fourth proportional to 644,206.72, 889,135.84 and 372,286.08 is: 513,830.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,206.72 : 889,135.84 = 372,286.08 : x
  2. Step 2: Convert to fraction form
    644,206.72/889,135.84 = 372,286.08/x
  3. Step 3: Cross multiply
    644,206.72x = 889,135.84 × 372,286.08
  4. Step 4: Simplify right side
    644,206.72x = 331,012,896,461.11
  5. Step 5: Solve for x
    x = 331,012,896,461.11/644,206.72
  6. Step 6: Final answer
    x = 513,830.24

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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.