Home / 1,638.96-2,447.58-1,440.24

Finding the Fourth Proportional to 1,638.96, 2,447.58 and 1,440.24

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Solution

The fourth proportional to 1,638.96, 2,447.58 and 1,440.24 is: 2,150.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.96 : 2,447.58 = 1,440.24 : x
  2. Step 2: Convert to fraction form
    1,638.96/2,447.58 = 1,440.24/x
  3. Step 3: Cross multiply
    1,638.96x = 2,447.58 × 1,440.24
  4. Step 4: Simplify right side
    1,638.96x = 3,525,102.62
  5. Step 5: Solve for x
    x = 3,525,102.62/1,638.96
  6. Step 6: Final answer
    x = 2,150.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.