Home / 2,155.38-2,972.07-1,455.54

Finding the Fourth Proportional to 2,155.38, 2,972.07 and 1,455.54

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Solution

The fourth proportional to 2,155.38, 2,972.07 and 1,455.54 is: 2,007.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.38 : 2,972.07 = 1,455.54 : x
  2. Step 2: Convert to fraction form
    2,155.38/2,972.07 = 1,455.54/x
  3. Step 3: Cross multiply
    2,155.38x = 2,972.07 × 1,455.54
  4. Step 4: Simplify right side
    2,155.38x = 4,325,966.77
  5. Step 5: Solve for x
    x = 4,325,966.77/2,155.38
  6. Step 6: Final answer
    x = 2,007.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.