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Finding the Fourth Proportional to 1,328.10, 1,991.61 and 597.48

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Solution

The fourth proportional to 1,328.10, 1,991.61 and 597.48 is: 895.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.10 : 1,991.61 = 597.48 : x
  2. Step 2: Convert to fraction form
    1,328.10/1,991.61 = 597.48/x
  3. Step 3: Cross multiply
    1,328.10x = 1,991.61 × 597.48
  4. Step 4: Simplify right side
    1,328.10x = 1,189,947.14
  5. Step 5: Solve for x
    x = 1,189,947.14/1,328.10
  6. Step 6: Final answer
    x = 895.98

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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.