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Finding the Fourth Proportional to 1,605.53, 2,215.71 and 942.44

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Solution

The fourth proportional to 1,605.53, 2,215.71 and 942.44 is: 1,300.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.53 : 2,215.71 = 942.44 : x
  2. Step 2: Convert to fraction form
    1,605.53/2,215.71 = 942.44/x
  3. Step 3: Cross multiply
    1,605.53x = 2,215.71 × 942.44
  4. Step 4: Simplify right side
    1,605.53x = 2,088,162.65
  5. Step 5: Solve for x
    x = 2,088,162.65/1,605.53
  6. Step 6: Final answer
    x = 1,300.61

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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.