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Finding the Fourth Proportional to 705.88, 1,057.98 and 445.92

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Solution

The fourth proportional to 705.88, 1,057.98 and 445.92 is: 668.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.88 : 1,057.98 = 445.92 : x
  2. Step 2: Convert to fraction form
    705.88/1,057.98 = 445.92/x
  3. Step 3: Cross multiply
    705.88x = 1,057.98 × 445.92
  4. Step 4: Simplify right side
    705.88x = 471,774.44
  5. Step 5: Solve for x
    x = 471,774.44/705.88
  6. Step 6: Final answer
    x = 668.35

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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.