Home / 2,025.65-3,038.61-639.05

Finding the Fourth Proportional to 2,025.65, 3,038.61 and 639.05

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Solution

The fourth proportional to 2,025.65, 3,038.61 and 639.05 is: 958.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,025.65 : 3,038.61 = 639.05 : x
  2. Step 2: Convert to fraction form
    2,025.65/3,038.61 = 639.05/x
  3. Step 3: Cross multiply
    2,025.65x = 3,038.61 × 639.05
  4. Step 4: Simplify right side
    2,025.65x = 1,941,808.53
  5. Step 5: Solve for x
    x = 1,941,808.53/2,025.65
  6. Step 6: Final answer
    x = 958.61

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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.