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Finding the Fourth Proportional to 706.19, 1,057.94 and 486.94

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Solution

The fourth proportional to 706.19, 1,057.94 and 486.94 is: 729.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.19 : 1,057.94 = 486.94 : x
  2. Step 2: Convert to fraction form
    706.19/1,057.94 = 486.94/x
  3. Step 3: Cross multiply
    706.19x = 1,057.94 × 486.94
  4. Step 4: Simplify right side
    706.19x = 515,148.01
  5. Step 5: Solve for x
    x = 515,148.01/706.19
  6. Step 6: Final answer
    x = 729.48

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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.