Home / 1,136.89-1,558.73-1,115.02

Finding the Fourth Proportional to 1,136.89, 1,558.73 and 1,115.02

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Solution

The fourth proportional to 1,136.89, 1,558.73 and 1,115.02 is: 1,528.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.89 : 1,558.73 = 1,115.02 : x
  2. Step 2: Convert to fraction form
    1,136.89/1,558.73 = 1,115.02/x
  3. Step 3: Cross multiply
    1,136.89x = 1,558.73 × 1,115.02
  4. Step 4: Simplify right side
    1,136.89x = 1,738,015.12
  5. Step 5: Solve for x
    x = 1,738,015.12/1,136.89
  6. Step 6: Final answer
    x = 1,528.75

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.