Home / 1,440.40-2,145.04-1,391.76

Finding the Fourth Proportional to 1,440.40, 2,145.04 and 1,391.76

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Solution

The fourth proportional to 1,440.40, 2,145.04 and 1,391.76 is: 2,072.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.40 : 2,145.04 = 1,391.76 : x
  2. Step 2: Convert to fraction form
    1,440.40/2,145.04 = 1,391.76/x
  3. Step 3: Cross multiply
    1,440.40x = 2,145.04 × 1,391.76
  4. Step 4: Simplify right side
    1,440.40x = 2,985,380.87
  5. Step 5: Solve for x
    x = 2,985,380.87/1,440.40
  6. Step 6: Final answer
    x = 2,072.61

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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.