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Finding the Fourth Proportional to 480.81, 721.50 and 275.67

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Solution

The fourth proportional to 480.81, 721.50 and 275.67 is: 413.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.81 : 721.50 = 275.67 : x
  2. Step 2: Convert to fraction form
    480.81/721.50 = 275.67/x
  3. Step 3: Cross multiply
    480.81x = 721.50 × 275.67
  4. Step 4: Simplify right side
    480.81x = 198,895.91
  5. Step 5: Solve for x
    x = 198,895.91/480.81
  6. Step 6: Final answer
    x = 413.67

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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.