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Finding the Fourth Proportional to 313.43, 470.18 and 137.93

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Solution

The fourth proportional to 313.43, 470.18 and 137.93 is: 206.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.43 : 470.18 = 137.93 : x
  2. Step 2: Convert to fraction form
    313.43/470.18 = 137.93/x
  3. Step 3: Cross multiply
    313.43x = 470.18 × 137.93
  4. Step 4: Simplify right side
    313.43x = 64,849.92
  5. Step 5: Solve for x
    x = 64,849.92/313.43
  6. Step 6: Final answer
    x = 206.91

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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.