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Finding the Fourth Proportional to 449.99, 621.23 and 302.88

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Solution

The fourth proportional to 449.99, 621.23 and 302.88 is: 418.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.99 : 621.23 = 302.88 : x
  2. Step 2: Convert to fraction form
    449.99/621.23 = 302.88/x
  3. Step 3: Cross multiply
    449.99x = 621.23 × 302.88
  4. Step 4: Simplify right side
    449.99x = 188,156.63
  5. Step 5: Solve for x
    x = 188,156.63/449.99
  6. Step 6: Final answer
    x = 418.14

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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.