Home / 1,316.99-1,975.49-1,236.80

Finding the Fourth Proportional to 1,316.99, 1,975.49 and 1,236.80

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Solution

The fourth proportional to 1,316.99, 1,975.49 and 1,236.80 is: 1,855.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.99 : 1,975.49 = 1,236.80 : x
  2. Step 2: Convert to fraction form
    1,316.99/1,975.49 = 1,236.80/x
  3. Step 3: Cross multiply
    1,316.99x = 1,975.49 × 1,236.80
  4. Step 4: Simplify right side
    1,316.99x = 2,443,289.42
  5. Step 5: Solve for x
    x = 2,443,289.42/1,316.99
  6. Step 6: Final answer
    x = 1,855.20

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Double scale
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Similar ratio
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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.