Home / 1,636.10-2,257.81-890.05

Finding the Fourth Proportional to 1,636.10, 2,257.81 and 890.05

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Solution

The fourth proportional to 1,636.10, 2,257.81 and 890.05 is: 1,228.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.10 : 2,257.81 = 890.05 : x
  2. Step 2: Convert to fraction form
    1,636.10/2,257.81 = 890.05/x
  3. Step 3: Cross multiply
    1,636.10x = 2,257.81 × 890.05
  4. Step 4: Simplify right side
    1,636.10x = 2,009,555.92
  5. Step 5: Solve for x
    x = 2,009,555.92/1,636.10
  6. Step 6: Final answer
    x = 1,228.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.