Home / 2,646.09-3,969.36-890.69

Finding the Fourth Proportional to 2,646.09, 3,969.36 and 890.69

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Solution

The fourth proportional to 2,646.09, 3,969.36 and 890.69 is: 1,336.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,646.09 : 3,969.36 = 890.69 : x
  2. Step 2: Convert to fraction form
    2,646.09/3,969.36 = 890.69/x
  3. Step 3: Cross multiply
    2,646.09x = 3,969.36 × 890.69
  4. Step 4: Simplify right side
    2,646.09x = 3,535,449.41
  5. Step 5: Solve for x
    x = 3,535,449.41/2,646.09
  6. Step 6: Final answer
    x = 1,336.10

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1.5x scale

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.