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Finding the Fourth Proportional to 470.60, 649.48 and 274.07

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Solution

The fourth proportional to 470.60, 649.48 and 274.07 is: 378.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.60 : 649.48 = 274.07 : x
  2. Step 2: Convert to fraction form
    470.60/649.48 = 274.07/x
  3. Step 3: Cross multiply
    470.60x = 649.48 × 274.07
  4. Step 4: Simplify right side
    470.60x = 178,002.98
  5. Step 5: Solve for x
    x = 178,002.98/470.60
  6. Step 6: Final answer
    x = 378.25

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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.