Home / 2,174.19-3,000.84-1,388.10

Finding the Fourth Proportional to 2,174.19, 3,000.84 and 1,388.10

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Solution

The fourth proportional to 2,174.19, 3,000.84 and 1,388.10 is: 1,915.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.19 : 3,000.84 = 1,388.10 : x
  2. Step 2: Convert to fraction form
    2,174.19/3,000.84 = 1,388.10/x
  3. Step 3: Cross multiply
    2,174.19x = 3,000.84 × 1,388.10
  4. Step 4: Simplify right side
    2,174.19x = 4,165,466.00
  5. Step 5: Solve for x
    x = 4,165,466.00/2,174.19
  6. Step 6: Final answer
    x = 1,915.87

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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.