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Finding the Fourth Proportional to 245.63, 368.45 and 74.63

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Solution

The fourth proportional to 245.63, 368.45 and 74.63 is: 111.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.63 : 368.45 = 74.63 : x
  2. Step 2: Convert to fraction form
    245.63/368.45 = 74.63/x
  3. Step 3: Cross multiply
    245.63x = 368.45 × 74.63
  4. Step 4: Simplify right side
    245.63x = 27,495.21
  5. Step 5: Solve for x
    x = 27,495.21/245.63
  6. Step 6: Final answer
    x = 111.94

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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.