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Finding the Fourth Proportional to 470.50, 649.42 and 305.17

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Solution

The fourth proportional to 470.50, 649.42 and 305.17 is: 421.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.50 : 649.42 = 305.17 : x
  2. Step 2: Convert to fraction form
    470.50/649.42 = 305.17/x
  3. Step 3: Cross multiply
    470.50x = 649.42 × 305.17
  4. Step 4: Simplify right side
    470.50x = 198,181.11
  5. Step 5: Solve for x
    x = 198,181.11/470.50
  6. Step 6: Final answer
    x = 421.22

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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.