Home / 1,418.13-1,956.60-858.90

Finding the Fourth Proportional to 1,418.13, 1,956.60 and 858.90

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Solution

The fourth proportional to 1,418.13, 1,956.60 and 858.90 is: 1,185.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.13 : 1,956.60 = 858.90 : x
  2. Step 2: Convert to fraction form
    1,418.13/1,956.60 = 858.90/x
  3. Step 3: Cross multiply
    1,418.13x = 1,956.60 × 858.90
  4. Step 4: Simplify right side
    1,418.13x = 1,680,523.74
  5. Step 5: Solve for x
    x = 1,680,523.74/1,418.13
  6. Step 6: Final answer
    x = 1,185.03

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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.