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Finding the Fourth Proportional to 313.47, 470.07 and 191.70

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Solution

The fourth proportional to 313.47, 470.07 and 191.70 is: 287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.47 : 470.07 = 191.70 : x
  2. Step 2: Convert to fraction form
    313.47/470.07 = 191.70/x
  3. Step 3: Cross multiply
    313.47x = 470.07 × 191.70
  4. Step 4: Simplify right side
    313.47x = 90,112.42
  5. Step 5: Solve for x
    x = 90,112.42/313.47
  6. Step 6: Final answer
    x = 287.47

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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.