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Finding the Fourth Proportional to 245.70, 368.21 and 154.17

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Solution

The fourth proportional to 245.70, 368.21 and 154.17 is: 231.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.70 : 368.21 = 154.17 : x
  2. Step 2: Convert to fraction form
    245.70/368.21 = 154.17/x
  3. Step 3: Cross multiply
    245.70x = 368.21 × 154.17
  4. Step 4: Simplify right side
    245.70x = 56,767.32
  5. Step 5: Solve for x
    x = 56,767.32/245.70
  6. Step 6: Final answer
    x = 231.04

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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.