Home / 1,768.50-2,653.36-1,280.68

Finding the Fourth Proportional to 1,768.50, 2,653.36 and 1,280.68

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Solution

The fourth proportional to 1,768.50, 2,653.36 and 1,280.68 is: 1,921.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.50 : 2,653.36 = 1,280.68 : x
  2. Step 2: Convert to fraction form
    1,768.50/2,653.36 = 1,280.68/x
  3. Step 3: Cross multiply
    1,768.50x = 2,653.36 × 1,280.68
  4. Step 4: Simplify right side
    1,768.50x = 3,398,095.25
  5. Step 5: Solve for x
    x = 3,398,095.25/1,768.50
  6. Step 6: Final answer
    x = 1,921.46

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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.