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Finding the Fourth Proportional to 1,219.39, 1,682.71 and 695.41

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Solution

The fourth proportional to 1,219.39, 1,682.71 and 695.41 is: 959.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.39 : 1,682.71 = 695.41 : x
  2. Step 2: Convert to fraction form
    1,219.39/1,682.71 = 695.41/x
  3. Step 3: Cross multiply
    1,219.39x = 1,682.71 × 695.41
  4. Step 4: Simplify right side
    1,219.39x = 1,170,167.42
  5. Step 5: Solve for x
    x = 1,170,167.42/1,219.39
  6. Step 6: Final answer
    x = 959.64

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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.