Home / 2,639.36-3,957.02-1,405.74

Finding the Fourth Proportional to 2,639.36, 3,957.02 and 1,405.74

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Solution

The fourth proportional to 2,639.36, 3,957.02 and 1,405.74 is: 2,107.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.36 : 3,957.02 = 1,405.74 : x
  2. Step 2: Convert to fraction form
    2,639.36/3,957.02 = 1,405.74/x
  3. Step 3: Cross multiply
    2,639.36x = 3,957.02 × 1,405.74
  4. Step 4: Simplify right side
    2,639.36x = 5,562,541.29
  5. Step 5: Solve for x
    x = 5,562,541.29/2,639.36
  6. Step 6: Final answer
    x = 2,107.53

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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.