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Finding the Fourth Proportional to 245.72, 368.56 and 154.15

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Solution

The fourth proportional to 245.72, 368.56 and 154.15 is: 231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.72 : 368.56 = 154.15 : x
  2. Step 2: Convert to fraction form
    245.72/368.56 = 154.15/x
  3. Step 3: Cross multiply
    245.72x = 368.56 × 154.15
  4. Step 4: Simplify right side
    245.72x = 56,812.22
  5. Step 5: Solve for x
    x = 56,812.22/245.72
  6. Step 6: Final answer
    x = 231.20

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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.