Home / 1,351.40-2,025.90-485.51

Finding the Fourth Proportional to 1,351.40, 2,025.90 and 485.51

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Solution

The fourth proportional to 1,351.40, 2,025.90 and 485.51 is: 727.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.40 : 2,025.90 = 485.51 : x
  2. Step 2: Convert to fraction form
    1,351.40/2,025.90 = 485.51/x
  3. Step 3: Cross multiply
    1,351.40x = 2,025.90 × 485.51
  4. Step 4: Simplify right side
    1,351.40x = 983,594.71
  5. Step 5: Solve for x
    x = 983,594.71/1,351.40
  6. Step 6: Final answer
    x = 727.83

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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.