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Finding the Fourth Proportional to 313.30, 470.04 and 137.62

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Solution

The fourth proportional to 313.30, 470.04 and 137.62 is: 206.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.30 : 470.04 = 137.62 : x
  2. Step 2: Convert to fraction form
    313.30/470.04 = 137.62/x
  3. Step 3: Cross multiply
    313.30x = 470.04 × 137.62
  4. Step 4: Simplify right side
    313.30x = 64,686.22
  5. Step 5: Solve for x
    x = 64,686.22/313.30
  6. Step 6: Final answer
    x = 206.47

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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.