Home / 1,378.08-2,066.37-453.03

Finding the Fourth Proportional to 1,378.08, 2,066.37 and 453.03

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Solution

The fourth proportional to 1,378.08, 2,066.37 and 453.03 is: 679.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.08 : 2,066.37 = 453.03 : x
  2. Step 2: Convert to fraction form
    1,378.08/2,066.37 = 453.03/x
  3. Step 3: Cross multiply
    1,378.08x = 2,066.37 × 453.03
  4. Step 4: Simplify right side
    1,378.08x = 936,127.60
  5. Step 5: Solve for x
    x = 936,127.60/1,378.08
  6. Step 6: Final answer
    x = 679.30

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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.