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Finding the Fourth Proportional to 653.72, 979.94 and 242.57

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Solution

The fourth proportional to 653.72, 979.94 and 242.57 is: 363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.72 : 979.94 = 242.57 : x
  2. Step 2: Convert to fraction form
    653.72/979.94 = 242.57/x
  3. Step 3: Cross multiply
    653.72x = 979.94 × 242.57
  4. Step 4: Simplify right side
    653.72x = 237,697.93
  5. Step 5: Solve for x
    x = 237,697.93/653.72
  6. Step 6: Final answer
    x = 363.61

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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.