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Finding the Fourth Proportional to 449.99, 620.79 and 302.67

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Solution

The fourth proportional to 449.99, 620.79 and 302.67 is: 417.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.99 : 620.79 = 302.67 : x
  2. Step 2: Convert to fraction form
    449.99/620.79 = 302.67/x
  3. Step 3: Cross multiply
    449.99x = 620.79 × 302.67
  4. Step 4: Simplify right side
    449.99x = 187,894.51
  5. Step 5: Solve for x
    x = 187,894.51/449.99
  6. Step 6: Final answer
    x = 417.56

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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.