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Finding the Fourth Proportional to 245.31, 368.16 and 108.45

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Solution

The fourth proportional to 245.31, 368.16 and 108.45 is: 162.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.31 : 368.16 = 108.45 : x
  2. Step 2: Convert to fraction form
    245.31/368.16 = 108.45/x
  3. Step 3: Cross multiply
    245.31x = 368.16 × 108.45
  4. Step 4: Simplify right side
    245.31x = 39,927.97
  5. Step 5: Solve for x
    x = 39,927.97/245.31
  6. Step 6: Final answer
    x = 162.76

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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.