Home / 2,123.55-3,186.36-890.94

Finding the Fourth Proportional to 2,123.55, 3,186.36 and 890.94

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Solution

The fourth proportional to 2,123.55, 3,186.36 and 890.94 is: 1,336.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.55 : 3,186.36 = 890.94 : x
  2. Step 2: Convert to fraction form
    2,123.55/3,186.36 = 890.94/x
  3. Step 3: Cross multiply
    2,123.55x = 3,186.36 × 890.94
  4. Step 4: Simplify right side
    2,123.55x = 2,838,855.58
  5. Step 5: Solve for x
    x = 2,838,855.58/2,123.55
  6. Step 6: Final answer
    x = 1,336.84

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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.