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Finding the Fourth Proportional to 245.68, 368.55 and 91.67

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Solution

The fourth proportional to 245.68, 368.55 and 91.67 is: 137.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.68 : 368.55 = 91.67 : x
  2. Step 2: Convert to fraction form
    245.68/368.55 = 91.67/x
  3. Step 3: Cross multiply
    245.68x = 368.55 × 91.67
  4. Step 4: Simplify right side
    245.68x = 33,783.14
  5. Step 5: Solve for x
    x = 33,783.14/245.68
  6. Step 6: Final answer
    x = 137.51

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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.