Home / 2,025.20-3,038.16-638.58

Finding the Fourth Proportional to 2,025.20, 3,038.16 and 638.58

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Solution

The fourth proportional to 2,025.20, 3,038.16 and 638.58 is: 957.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,025.20 : 3,038.16 = 638.58 : x
  2. Step 2: Convert to fraction form
    2,025.20/3,038.16 = 638.58/x
  3. Step 3: Cross multiply
    2,025.20x = 3,038.16 × 638.58
  4. Step 4: Simplify right side
    2,025.20x = 1,940,108.21
  5. Step 5: Solve for x
    x = 1,940,108.21/2,025.20
  6. Step 6: Final answer
    x = 957.98

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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.