Home / 1,438.22-2,157.33-572.54

Finding the Fourth Proportional to 1,438.22, 2,157.33 and 572.54

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Solution

The fourth proportional to 1,438.22, 2,157.33 and 572.54 is: 858.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.22 : 2,157.33 = 572.54 : x
  2. Step 2: Convert to fraction form
    1,438.22/2,157.33 = 572.54/x
  3. Step 3: Cross multiply
    1,438.22x = 2,157.33 × 572.54
  4. Step 4: Simplify right side
    1,438.22x = 1,235,157.72
  5. Step 5: Solve for x
    x = 1,235,157.72/1,438.22
  6. Step 6: Final answer
    x = 858.81

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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.