Home / 1,636.22-2,257.93-890.15

Finding the Fourth Proportional to 1,636.22, 2,257.93 and 890.15

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Solution

The fourth proportional to 1,636.22, 2,257.93 and 890.15 is: 1,228.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.22 : 2,257.93 = 890.15 : x
  2. Step 2: Convert to fraction form
    1,636.22/2,257.93 = 890.15/x
  3. Step 3: Cross multiply
    1,636.22x = 2,257.93 × 890.15
  4. Step 4: Simplify right side
    1,636.22x = 2,009,891.94
  5. Step 5: Solve for x
    x = 2,009,891.94/1,636.22
  6. Step 6: Final answer
    x = 1,228.38

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Half scale
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Double scale
Find fourth proportional to 1,637.22, 2,259.30 and 891.15
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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.