Home / 1,245.43-1,868.13-423.70

Finding the Fourth Proportional to 1,245.43, 1,868.13 and 423.70

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Solution

The fourth proportional to 1,245.43, 1,868.13 and 423.70 is: 635.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.43 : 1,868.13 = 423.70 : x
  2. Step 2: Convert to fraction form
    1,245.43/1,868.13 = 423.70/x
  3. Step 3: Cross multiply
    1,245.43x = 1,868.13 × 423.70
  4. Step 4: Simplify right side
    1,245.43x = 791,526.68
  5. Step 5: Solve for x
    x = 791,526.68/1,245.43
  6. Step 6: Final answer
    x = 635.54

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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.