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Finding the Fourth Proportional to 313.77, 470.61 and 192.78

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Solution

The fourth proportional to 313.77, 470.61 and 192.78 is: 289.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.77 : 470.61 = 192.78 : x
  2. Step 2: Convert to fraction form
    313.77/470.61 = 192.78/x
  3. Step 3: Cross multiply
    313.77x = 470.61 × 192.78
  4. Step 4: Simplify right side
    313.77x = 90,724.20
  5. Step 5: Solve for x
    x = 90,724.20/313.77
  6. Step 6: Final answer
    x = 289.14

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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.