Home / 1,505.48-2,080.56-1,286.76

Finding the Fourth Proportional to 1,505.48, 2,080.56 and 1,286.76

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Solution

The fourth proportional to 1,505.48, 2,080.56 and 1,286.76 is: 1,778.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.48 : 2,080.56 = 1,286.76 : x
  2. Step 2: Convert to fraction form
    1,505.48/2,080.56 = 1,286.76/x
  3. Step 3: Cross multiply
    1,505.48x = 2,080.56 × 1,286.76
  4. Step 4: Simplify right side
    1,505.48x = 2,677,181.39
  5. Step 5: Solve for x
    x = 2,677,181.39/1,505.48
  6. Step 6: Final answer
    x = 1,778.29

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Half 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.