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Finding the Fourth Proportional to 1,147.60, 1,583.62 and 623.62

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Solution

The fourth proportional to 1,147.60, 1,583.62 and 623.62 is: 860.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.60 : 1,583.62 = 623.62 : x
  2. Step 2: Convert to fraction form
    1,147.60/1,583.62 = 623.62/x
  3. Step 3: Cross multiply
    1,147.60x = 1,583.62 × 623.62
  4. Step 4: Simplify right side
    1,147.60x = 987,577.10
  5. Step 5: Solve for x
    x = 987,577.10/1,147.60
  6. Step 6: Final answer
    x = 860.56

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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.