Home / 1,280.48-1,912.60-1,137.12

Finding the Fourth Proportional to 1,280.48, 1,912.60 and 1,137.12

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Solution

The fourth proportional to 1,280.48, 1,912.60 and 1,137.12 is: 1,698.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.48 : 1,912.60 = 1,137.12 : x
  2. Step 2: Convert to fraction form
    1,280.48/1,912.60 = 1,137.12/x
  3. Step 3: Cross multiply
    1,280.48x = 1,912.60 × 1,137.12
  4. Step 4: Simplify right side
    1,280.48x = 2,174,855.71
  5. Step 5: Solve for x
    x = 2,174,855.71/1,280.48
  6. Step 6: Final answer
    x = 1,698.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.