Home / 2,123.15-3,184.11-890.55

Finding the Fourth Proportional to 2,123.15, 3,184.11 and 890.55

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Solution

The fourth proportional to 2,123.15, 3,184.11 and 890.55 is: 1,335.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.15 : 3,184.11 = 890.55 : x
  2. Step 2: Convert to fraction form
    2,123.15/3,184.11 = 890.55/x
  3. Step 3: Cross multiply
    2,123.15x = 3,184.11 × 890.55
  4. Step 4: Simplify right side
    2,123.15x = 2,835,609.16
  5. Step 5: Solve for x
    x = 2,835,609.16/2,123.15
  6. Step 6: Final answer
    x = 1,335.57

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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.