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Finding the Fourth Proportional to 313.65, 470.47 and 130.79

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Solution

The fourth proportional to 313.65, 470.47 and 130.79 is: 196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.65 : 470.47 = 130.79 : x
  2. Step 2: Convert to fraction form
    313.65/470.47 = 130.79/x
  3. Step 3: Cross multiply
    313.65x = 470.47 × 130.79
  4. Step 4: Simplify right side
    313.65x = 61,532.77
  5. Step 5: Solve for x
    x = 61,532.77/313.65
  6. Step 6: Final answer
    x = 196.18

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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.