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Finding the Fourth Proportional to 660.17, 910.50 and 449.99

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Solution

The fourth proportional to 660.17, 910.50 and 449.99 is: 620.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.17 : 910.50 = 449.99 : x
  2. Step 2: Convert to fraction form
    660.17/910.50 = 449.99/x
  3. Step 3: Cross multiply
    660.17x = 910.50 × 449.99
  4. Step 4: Simplify right side
    660.17x = 409,715.90
  5. Step 5: Solve for x
    x = 409,715.90/660.17
  6. Step 6: Final answer
    x = 620.62

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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.