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Finding the Fourth Proportional to 245.89, 368.84 and 72.56

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Solution

The fourth proportional to 245.89, 368.84 and 72.56 is: 108.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.89 : 368.84 = 72.56 : x
  2. Step 2: Convert to fraction form
    245.89/368.84 = 72.56/x
  3. Step 3: Cross multiply
    245.89x = 368.84 × 72.56
  4. Step 4: Simplify right side
    245.89x = 26,764.23
  5. Step 5: Solve for x
    x = 26,764.23/245.89
  6. Step 6: Final answer
    x = 108.84

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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.