Home / 1,438.28-2,158.04-572.36

Finding the Fourth Proportional to 1,438.28, 2,158.04 and 572.36

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Solution

The fourth proportional to 1,438.28, 2,158.04 and 572.36 is: 858.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.28 : 2,158.04 = 572.36 : x
  2. Step 2: Convert to fraction form
    1,438.28/2,158.04 = 572.36/x
  3. Step 3: Cross multiply
    1,438.28x = 2,158.04 × 572.36
  4. Step 4: Simplify right side
    1,438.28x = 1,235,175.77
  5. Step 5: Solve for x
    x = 1,235,175.77/1,438.28
  6. Step 6: Final answer
    x = 858.79

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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.