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Finding the Fourth Proportional to 653.19, 979.79 and 242.11

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Solution

The fourth proportional to 653.19, 979.79 and 242.11 is: 363.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.19 : 979.79 = 242.11 : x
  2. Step 2: Convert to fraction form
    653.19/979.79 = 242.11/x
  3. Step 3: Cross multiply
    653.19x = 979.79 × 242.11
  4. Step 4: Simplify right side
    653.19x = 237,216.96
  5. Step 5: Solve for x
    x = 237,216.96/653.19
  6. Step 6: Final answer
    x = 363.17

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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.