Home / 1,440.45-2,156.96-1,320.17

Finding the Fourth Proportional to 1,440.45, 2,156.96 and 1,320.17

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Solution

The fourth proportional to 1,440.45, 2,156.96 and 1,320.17 is: 1,976.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.45 : 2,156.96 = 1,320.17 : x
  2. Step 2: Convert to fraction form
    1,440.45/2,156.96 = 1,320.17/x
  3. Step 3: Cross multiply
    1,440.45x = 2,156.96 × 1,320.17
  4. Step 4: Simplify right side
    1,440.45x = 2,847,546.40
  5. Step 5: Solve for x
    x = 2,847,546.40/1,440.45
  6. Step 6: Final answer
    x = 1,976.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.