Home / 1,245.37-1,868.30-423.61

Finding the Fourth Proportional to 1,245.37, 1,868.30 and 423.61

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Solution

The fourth proportional to 1,245.37, 1,868.30 and 423.61 is: 635.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.37 : 1,868.30 = 423.61 : x
  2. Step 2: Convert to fraction form
    1,245.37/1,868.30 = 423.61/x
  3. Step 3: Cross multiply
    1,245.37x = 1,868.30 × 423.61
  4. Step 4: Simplify right side
    1,245.37x = 791,430.56
  5. Step 5: Solve for x
    x = 791,430.56/1,245.37
  6. Step 6: Final answer
    x = 635.50

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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.