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Finding the Fourth Proportional to 470.96, 649.71 and 305.23

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Solution

The fourth proportional to 470.96, 649.71 and 305.23 is: 421.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.96 : 649.71 = 305.23 : x
  2. Step 2: Convert to fraction form
    470.96/649.71 = 305.23/x
  3. Step 3: Cross multiply
    470.96x = 649.71 × 305.23
  4. Step 4: Simplify right side
    470.96x = 198,309.46
  5. Step 5: Solve for x
    x = 198,309.46/470.96
  6. Step 6: Final answer
    x = 421.07

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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.