Home / 1,328.08-1,991.66-450.40

Finding the Fourth Proportional to 1,328.08, 1,991.66 and 450.40

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Solution

The fourth proportional to 1,328.08, 1,991.66 and 450.40 is: 675.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.08 : 1,991.66 = 450.40 : x
  2. Step 2: Convert to fraction form
    1,328.08/1,991.66 = 450.40/x
  3. Step 3: Cross multiply
    1,328.08x = 1,991.66 × 450.40
  4. Step 4: Simplify right side
    1,328.08x = 897,043.66
  5. Step 5: Solve for x
    x = 897,043.66/1,328.08
  6. Step 6: Final answer
    x = 675.44

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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.