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Finding the Fourth Proportional to 2,519.40, 3,779.16 and 959.20

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Solution

The fourth proportional to 2,519.40, 3,779.16 and 959.20 is: 1,438.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,519.40 : 3,779.16 = 959.20 : x
  2. Step 2: Convert to fraction form
    2,519.40/3,779.16 = 959.20/x
  3. Step 3: Cross multiply
    2,519.40x = 3,779.16 × 959.20
  4. Step 4: Simplify right side
    2,519.40x = 3,624,970.27
  5. Step 5: Solve for x
    x = 3,624,970.27/2,519.40
  6. Step 6: Final answer
    x = 1,438.82

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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.