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Finding the Fourth Proportional to 245.39, 368.28 and 129.96

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Solution

The fourth proportional to 245.39, 368.28 and 129.96 is: 195.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.39 : 368.28 = 129.96 : x
  2. Step 2: Convert to fraction form
    245.39/368.28 = 129.96/x
  3. Step 3: Cross multiply
    245.39x = 368.28 × 129.96
  4. Step 4: Simplify right side
    245.39x = 47,861.67
  5. Step 5: Solve for x
    x = 47,861.67/245.39
  6. Step 6: Final answer
    x = 195.05

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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.