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Finding the Fourth Proportional to 705.78, 971.60 and 606.96

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Solution

The fourth proportional to 705.78, 971.60 and 606.96 is: 835.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.78 : 971.60 = 606.96 : x
  2. Step 2: Convert to fraction form
    705.78/971.60 = 606.96/x
  3. Step 3: Cross multiply
    705.78x = 971.60 × 606.96
  4. Step 4: Simplify right side
    705.78x = 589,719.30
  5. Step 5: Solve for x
    x = 589,719.30/705.78
  6. Step 6: Final answer
    x = 835.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.