Home / 2,156.72-2,977.40-1,683.60

Finding the Fourth Proportional to 2,156.72, 2,977.40 and 1,683.60

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Solution

The fourth proportional to 2,156.72, 2,977.40 and 1,683.60 is: 2,324.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.72 : 2,977.40 = 1,683.60 : x
  2. Step 2: Convert to fraction form
    2,156.72/2,977.40 = 1,683.60/x
  3. Step 3: Cross multiply
    2,156.72x = 2,977.40 × 1,683.60
  4. Step 4: Simplify right side
    2,156.72x = 5,012,750.64
  5. Step 5: Solve for x
    x = 5,012,750.64/2,156.72
  6. Step 6: Final answer
    x = 2,324.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.