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Finding the Fourth Proportional to 245.13, 338.12 and 146.81

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Solution

The fourth proportional to 245.13, 338.12 and 146.81 is: 202.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.13 : 338.12 = 146.81 : x
  2. Step 2: Convert to fraction form
    245.13/338.12 = 146.81/x
  3. Step 3: Cross multiply
    245.13x = 338.12 × 146.81
  4. Step 4: Simplify right side
    245.13x = 49,639.40
  5. Step 5: Solve for x
    x = 49,639.40/245.13
  6. Step 6: Final answer
    x = 202.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.