Home / 1,889.20-2,606.72-1,680.24

Finding the Fourth Proportional to 1,889.20, 2,606.72 and 1,680.24

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Solution

The fourth proportional to 1,889.20, 2,606.72 and 1,680.24 is: 2,318.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.20 : 2,606.72 = 1,680.24 : x
  2. Step 2: Convert to fraction form
    1,889.20/2,606.72 = 1,680.24/x
  3. Step 3: Cross multiply
    1,889.20x = 2,606.72 × 1,680.24
  4. Step 4: Simplify right side
    1,889.20x = 4,379,915.21
  5. Step 5: Solve for x
    x = 4,379,915.21/1,889.20
  6. Step 6: Final answer
    x = 2,318.40

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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.