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Finding the Fourth Proportional to 1,325.83, 1,986.87 and 976.43

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Solution

The fourth proportional to 1,325.83, 1,986.87 and 976.43 is: 1,463.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.83 : 1,986.87 = 976.43 : x
  2. Step 2: Convert to fraction form
    1,325.83/1,986.87 = 976.43/x
  3. Step 3: Cross multiply
    1,325.83x = 1,986.87 × 976.43
  4. Step 4: Simplify right side
    1,325.83x = 1,940,030.19
  5. Step 5: Solve for x
    x = 1,940,030.19/1,325.83
  6. Step 6: Final answer
    x = 1,463.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.