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Finding the Fourth Proportional to 409.65, 614.48 and 193.11

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Solution

The fourth proportional to 409.65, 614.48 and 193.11 is: 289.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.65 : 614.48 = 193.11 : x
  2. Step 2: Convert to fraction form
    409.65/614.48 = 193.11/x
  3. Step 3: Cross multiply
    409.65x = 614.48 × 193.11
  4. Step 4: Simplify right side
    409.65x = 118,661.27
  5. Step 5: Solve for x
    x = 118,661.27/409.65
  6. Step 6: Final answer
    x = 289.67

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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.