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Finding the Fourth Proportional to 313.64, 470.38 and 191.46

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Solution

The fourth proportional to 313.64, 470.38 and 191.46 is: 287.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.64 : 470.38 = 191.46 : x
  2. Step 2: Convert to fraction form
    313.64/470.38 = 191.46/x
  3. Step 3: Cross multiply
    313.64x = 470.38 × 191.46
  4. Step 4: Simplify right side
    313.64x = 90,058.95
  5. Step 5: Solve for x
    x = 90,058.95/313.64
  6. Step 6: Final answer
    x = 287.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.