Home / 1,636.62-2,259.35-1,115.39

Finding the Fourth Proportional to 1,636.62, 2,259.35 and 1,115.39

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Solution

The fourth proportional to 1,636.62, 2,259.35 and 1,115.39 is: 1,539.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.62 : 2,259.35 = 1,115.39 : x
  2. Step 2: Convert to fraction form
    1,636.62/2,259.35 = 1,115.39/x
  3. Step 3: Cross multiply
    1,636.62x = 2,259.35 × 1,115.39
  4. Step 4: Simplify right side
    1,636.62x = 2,520,039.52
  5. Step 5: Solve for x
    x = 2,520,039.52/1,636.62
  6. Step 6: Final answer
    x = 1,539.78

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Double scale
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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.