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Finding the Fourth Proportional to 1,225.25, 1,690.84 and 701.27

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Solution

The fourth proportional to 1,225.25, 1,690.84 and 701.27 is: 967.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.25 : 1,690.84 = 701.27 : x
  2. Step 2: Convert to fraction form
    1,225.25/1,690.84 = 701.27/x
  3. Step 3: Cross multiply
    1,225.25x = 1,690.84 × 701.27
  4. Step 4: Simplify right side
    1,225.25x = 1,185,737.84
  5. Step 5: Solve for x
    x = 1,185,737.84/1,225.25
  6. Step 6: Final answer
    x = 967.76

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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.