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Finding the Fourth Proportional to 1,683.20, 2,525.50 and 758.12

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Solution

The fourth proportional to 1,683.20, 2,525.50 and 758.12 is: 1,137.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,683.20 : 2,525.50 = 758.12 : x
  2. Step 2: Convert to fraction form
    1,683.20/2,525.50 = 758.12/x
  3. Step 3: Cross multiply
    1,683.20x = 2,525.50 × 758.12
  4. Step 4: Simplify right side
    1,683.20x = 1,914,632.06
  5. Step 5: Solve for x
    x = 1,914,632.06/1,683.20
  6. Step 6: Final answer
    x = 1,137.50

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Double scale
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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.