Home / 1,418.18-1,957.26-858.55

Finding the Fourth Proportional to 1,418.18, 1,957.26 and 858.55

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Solution

The fourth proportional to 1,418.18, 1,957.26 and 858.55 is: 1,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.18 : 1,957.26 = 858.55 : x
  2. Step 2: Convert to fraction form
    1,418.18/1,957.26 = 858.55/x
  3. Step 3: Cross multiply
    1,418.18x = 1,957.26 × 858.55
  4. Step 4: Simplify right side
    1,418.18x = 1,680,407.57
  5. Step 5: Solve for x
    x = 1,680,407.57/1,418.18
  6. Step 6: Final answer
    x = 1,184.90

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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.