Home / 3,122.40-4,683.55-931.14

Finding the Fourth Proportional to 3,122.40, 4,683.55 and 931.14

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Solution

The fourth proportional to 3,122.40, 4,683.55 and 931.14 is: 1,396.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.40 : 4,683.55 = 931.14 : x
  2. Step 2: Convert to fraction form
    3,122.40/4,683.55 = 931.14/x
  3. Step 3: Cross multiply
    3,122.40x = 4,683.55 × 931.14
  4. Step 4: Simplify right side
    3,122.40x = 4,361,040.75
  5. Step 5: Solve for x
    x = 4,361,040.75/3,122.40
  6. Step 6: Final answer
    x = 1,396.70

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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.