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Finding the Fourth Proportional to 705.56, 1,055.57 and 670.95

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Solution

The fourth proportional to 705.56, 1,055.57 and 670.95 is: 1,003.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.56 : 1,055.57 = 670.95 : x
  2. Step 2: Convert to fraction form
    705.56/1,055.57 = 670.95/x
  3. Step 3: Cross multiply
    705.56x = 1,055.57 × 670.95
  4. Step 4: Simplify right side
    705.56x = 708,231.34
  5. Step 5: Solve for x
    x = 708,231.34/705.56
  6. Step 6: Final answer
    x = 1,003.79

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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.