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Finding the Fourth Proportional to 705.44, 1,055.58 and 680.84

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Solution

The fourth proportional to 705.44, 1,055.58 and 680.84 is: 1,018.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.44 : 1,055.58 = 680.84 : x
  2. Step 2: Convert to fraction form
    705.44/1,055.58 = 680.84/x
  3. Step 3: Cross multiply
    705.44x = 1,055.58 × 680.84
  4. Step 4: Simplify right side
    705.44x = 718,675.81
  5. Step 5: Solve for x
    x = 718,675.81/705.44
  6. Step 6: Final answer
    x = 1,018.77

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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.