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Finding the Fourth Proportional to 411.45, 567.74 and 245.67

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Solution

The fourth proportional to 411.45, 567.74 and 245.67 is: 338.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.45 : 567.74 = 245.67 : x
  2. Step 2: Convert to fraction form
    411.45/567.74 = 245.67/x
  3. Step 3: Cross multiply
    411.45x = 567.74 × 245.67
  4. Step 4: Simplify right side
    411.45x = 139,475.17
  5. Step 5: Solve for x
    x = 139,475.17/411.45
  6. Step 6: Final answer
    x = 338.99

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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.