Home / 1,440.17-2,158.43-919.97

Finding the Fourth Proportional to 1,440.17, 2,158.43 and 919.97

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Solution

The fourth proportional to 1,440.17, 2,158.43 and 919.97 is: 1,378.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.17 : 2,158.43 = 919.97 : x
  2. Step 2: Convert to fraction form
    1,440.17/2,158.43 = 919.97/x
  3. Step 3: Cross multiply
    1,440.17x = 2,158.43 × 919.97
  4. Step 4: Simplify right side
    1,440.17x = 1,985,675.46
  5. Step 5: Solve for x
    x = 1,985,675.46/1,440.17
  6. Step 6: Final answer
    x = 1,378.78

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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.