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Finding the Fourth Proportional to 619.77, 928.57 and 326.83

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Solution

The fourth proportional to 619.77, 928.57 and 326.83 is: 489.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.77 : 928.57 = 326.83 : x
  2. Step 2: Convert to fraction form
    619.77/928.57 = 326.83/x
  3. Step 3: Cross multiply
    619.77x = 928.57 × 326.83
  4. Step 4: Simplify right side
    619.77x = 303,484.53
  5. Step 5: Solve for x
    x = 303,484.53/619.77
  6. Step 6: Final answer
    x = 489.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.