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Finding the Fourth Proportional to 245.85, 368.76 and 91.77

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Solution

The fourth proportional to 245.85, 368.76 and 91.77 is: 137.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.85 : 368.76 = 91.77 : x
  2. Step 2: Convert to fraction form
    245.85/368.76 = 91.77/x
  3. Step 3: Cross multiply
    245.85x = 368.76 × 91.77
  4. Step 4: Simplify right side
    245.85x = 33,841.11
  5. Step 5: Solve for x
    x = 33,841.11/245.85
  6. Step 6: Final answer
    x = 137.65

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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.