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Finding the Fourth Proportional to 1,219.58, 1,682.61 and 695.24

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Solution

The fourth proportional to 1,219.58, 1,682.61 and 695.24 is: 959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.58 : 1,682.61 = 695.24 : x
  2. Step 2: Convert to fraction form
    1,219.58/1,682.61 = 695.24/x
  3. Step 3: Cross multiply
    1,219.58x = 1,682.61 × 695.24
  4. Step 4: Simplify right side
    1,219.58x = 1,169,817.78
  5. Step 5: Solve for x
    x = 1,169,817.78/1,219.58
  6. Step 6: Final answer
    x = 959.20

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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.