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Finding the Fourth Proportional to 409.93, 615.05 and 190.67

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Solution

The fourth proportional to 409.93, 615.05 and 190.67 is: 286.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.93 : 615.05 = 190.67 : x
  2. Step 2: Convert to fraction form
    409.93/615.05 = 190.67/x
  3. Step 3: Cross multiply
    409.93x = 615.05 × 190.67
  4. Step 4: Simplify right side
    409.93x = 117,268.27
  5. Step 5: Solve for x
    x = 117,268.27/409.93
  6. Step 6: Final answer
    x = 286.07

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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.