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Finding the Fourth Proportional to 1,147.63, 1,583.73 and 623.66

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Solution

The fourth proportional to 1,147.63, 1,583.73 and 623.66 is: 860.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.63 : 1,583.73 = 623.66 : x
  2. Step 2: Convert to fraction form
    1,147.63/1,583.73 = 623.66/x
  3. Step 3: Cross multiply
    1,147.63x = 1,583.73 × 623.66
  4. Step 4: Simplify right side
    1,147.63x = 987,709.05
  5. Step 5: Solve for x
    x = 987,709.05/1,147.63
  6. Step 6: Final answer
    x = 860.65

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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.