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Finding the Fourth Proportional to 1,328.30, 1,991.75 and 597.25

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Solution

The fourth proportional to 1,328.30, 1,991.75 and 597.25 is: 895.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.30 : 1,991.75 = 597.25 : x
  2. Step 2: Convert to fraction form
    1,328.30/1,991.75 = 597.25/x
  3. Step 3: Cross multiply
    1,328.30x = 1,991.75 × 597.25
  4. Step 4: Simplify right side
    1,328.30x = 1,189,562.73
  5. Step 5: Solve for x
    x = 1,189,562.73/1,328.30
  6. Step 6: Final answer
    x = 895.56

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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.