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Finding the Fourth Proportional to 444.45, 611.91 and 389.37

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Solution

The fourth proportional to 444.45, 611.91 and 389.37 is: 536.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.45 : 611.91 = 389.37 : x
  2. Step 2: Convert to fraction form
    444.45/611.91 = 389.37/x
  3. Step 3: Cross multiply
    444.45x = 611.91 × 389.37
  4. Step 4: Simplify right side
    444.45x = 238,259.40
  5. Step 5: Solve for x
    x = 238,259.40/444.45
  6. Step 6: Final answer
    x = 536.08

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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.