Home / 1,438.28-2,157.50-572.57

Finding the Fourth Proportional to 1,438.28, 2,157.50 and 572.57

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Solution

The fourth proportional to 1,438.28, 2,157.50 and 572.57 is: 858.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.28 : 2,157.50 = 572.57 : x
  2. Step 2: Convert to fraction form
    1,438.28/2,157.50 = 572.57/x
  3. Step 3: Cross multiply
    1,438.28x = 2,157.50 × 572.57
  4. Step 4: Simplify right side
    1,438.28x = 1,235,308.99
  5. Step 5: Solve for x
    x = 1,235,308.99/1,438.28
  6. Step 6: Final answer
    x = 858.88

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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.