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Finding the Fourth Proportional to 444.15, 611.55 and 381.87

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Solution

The fourth proportional to 444.15, 611.55 and 381.87 is: 525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.15 : 611.55 = 381.87 : x
  2. Step 2: Convert to fraction form
    444.15/611.55 = 381.87/x
  3. Step 3: Cross multiply
    444.15x = 611.55 × 381.87
  4. Step 4: Simplify right side
    444.15x = 233,532.60
  5. Step 5: Solve for x
    x = 233,532.60/444.15
  6. Step 6: Final answer
    x = 525.80

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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.