Home / 1,639.78-2,444.75-1,455.10

Finding the Fourth Proportional to 1,639.78, 2,444.75 and 1,455.10

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Solution

The fourth proportional to 1,639.78, 2,444.75 and 1,455.10 is: 2,169.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.78 : 2,444.75 = 1,455.10 : x
  2. Step 2: Convert to fraction form
    1,639.78/2,444.75 = 1,455.10/x
  3. Step 3: Cross multiply
    1,639.78x = 2,444.75 × 1,455.10
  4. Step 4: Simplify right side
    1,639.78x = 3,557,355.73
  5. Step 5: Solve for x
    x = 3,557,355.73/1,639.78
  6. Step 6: Final answer
    x = 2,169.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.