Home / 1,438.04-2,157.41-513.45

Finding the Fourth Proportional to 1,438.04, 2,157.41 and 513.45

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Solution

The fourth proportional to 1,438.04, 2,157.41 and 513.45 is: 770.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.04 : 2,157.41 = 513.45 : x
  2. Step 2: Convert to fraction form
    1,438.04/2,157.41 = 513.45/x
  3. Step 3: Cross multiply
    1,438.04x = 2,157.41 × 513.45
  4. Step 4: Simplify right side
    1,438.04x = 1,107,723.45
  5. Step 5: Solve for x
    x = 1,107,723.45/1,438.04
  6. Step 6: Final answer
    x = 770.30

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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.