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Finding the Fourth Proportional to 315.97, 474.86 and 208.44

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Solution

The fourth proportional to 315.97, 474.86 and 208.44 is: 313.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.97 : 474.86 = 208.44 : x
  2. Step 2: Convert to fraction form
    315.97/474.86 = 208.44/x
  3. Step 3: Cross multiply
    315.97x = 474.86 × 208.44
  4. Step 4: Simplify right side
    315.97x = 98,980.34
  5. Step 5: Solve for x
    x = 98,980.34/315.97
  6. Step 6: Final answer
    x = 313.26

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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.