Home / 1,418.14-1,956.30-858.63

Finding the Fourth Proportional to 1,418.14, 1,956.30 and 858.63

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Solution

The fourth proportional to 1,418.14, 1,956.30 and 858.63 is: 1,184.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.14 : 1,956.30 = 858.63 : x
  2. Step 2: Convert to fraction form
    1,418.14/1,956.30 = 858.63/x
  3. Step 3: Cross multiply
    1,418.14x = 1,956.30 × 858.63
  4. Step 4: Simplify right side
    1,418.14x = 1,679,737.87
  5. Step 5: Solve for x
    x = 1,679,737.87/1,418.14
  6. Step 6: Final answer
    x = 1,184.47

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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.