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Finding the Fourth Proportional to 444.94, 612.39 and 428.38

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Solution

The fourth proportional to 444.94, 612.39 and 428.38 is: 589.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.94 : 612.39 = 428.38 : x
  2. Step 2: Convert to fraction form
    444.94/612.39 = 428.38/x
  3. Step 3: Cross multiply
    444.94x = 612.39 × 428.38
  4. Step 4: Simplify right side
    444.94x = 262,335.63
  5. Step 5: Solve for x
    x = 262,335.63/444.94
  6. Step 6: Final answer
    x = 589.60

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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.