Home / 1,683.20-2,522.10-1,105.40

Finding the Fourth Proportional to 1,683.20, 2,522.10 and 1,105.40

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Solution

The fourth proportional to 1,683.20, 2,522.10 and 1,105.40 is: 1,656.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,683.20 : 2,522.10 = 1,105.40 : x
  2. Step 2: Convert to fraction form
    1,683.20/2,522.10 = 1,105.40/x
  3. Step 3: Cross multiply
    1,683.20x = 2,522.10 × 1,105.40
  4. Step 4: Simplify right side
    1,683.20x = 2,787,929.34
  5. Step 5: Solve for x
    x = 2,787,929.34/1,683.20
  6. Step 6: Final answer
    x = 1,656.33

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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.