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Finding the Fourth Proportional to 245.90, 368.91 and 137.77

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Solution

The fourth proportional to 245.90, 368.91 and 137.77 is: 206.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.90 : 368.91 = 137.77 : x
  2. Step 2: Convert to fraction form
    245.90/368.91 = 137.77/x
  3. Step 3: Cross multiply
    245.90x = 368.91 × 137.77
  4. Step 4: Simplify right side
    245.90x = 50,822.89
  5. Step 5: Solve for x
    x = 50,822.89/245.90
  6. Step 6: Final answer
    x = 206.68

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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.