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Finding the Fourth Proportional to 705.23, 1,057.78 and 242.94

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Solution

The fourth proportional to 705.23, 1,057.78 and 242.94 is: 364.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.23 : 1,057.78 = 242.94 : x
  2. Step 2: Convert to fraction form
    705.23/1,057.78 = 242.94/x
  3. Step 3: Cross multiply
    705.23x = 1,057.78 × 242.94
  4. Step 4: Simplify right side
    705.23x = 256,979.98
  5. Step 5: Solve for x
    x = 256,979.98/705.23
  6. Step 6: Final answer
    x = 364.39

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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.