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Finding the Fourth Proportional to 386.85, 581.09 and 242.67

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Solution

The fourth proportional to 386.85, 581.09 and 242.67 is: 364.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.85 : 581.09 = 242.67 : x
  2. Step 2: Convert to fraction form
    386.85/581.09 = 242.67/x
  3. Step 3: Cross multiply
    386.85x = 581.09 × 242.67
  4. Step 4: Simplify right side
    386.85x = 141,013.11
  5. Step 5: Solve for x
    x = 141,013.11/386.85
  6. Step 6: Final answer
    x = 364.52

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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.