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Finding the Fourth Proportional to 444.69, 612.77 and 287.15

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Solution

The fourth proportional to 444.69, 612.77 and 287.15 is: 395.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.69 : 612.77 = 287.15 : x
  2. Step 2: Convert to fraction form
    444.69/612.77 = 287.15/x
  3. Step 3: Cross multiply
    444.69x = 612.77 × 287.15
  4. Step 4: Simplify right side
    444.69x = 175,952.41
  5. Step 5: Solve for x
    x = 175,952.41/444.69
  6. Step 6: Final answer
    x = 395.67

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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.