Home / 1,277.73-1,904.58-1,138.20

Finding the Fourth Proportional to 1,277.73, 1,904.58 and 1,138.20

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Solution

The fourth proportional to 1,277.73, 1,904.58 and 1,138.20 is: 1,696.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.73 : 1,904.58 = 1,138.20 : x
  2. Step 2: Convert to fraction form
    1,277.73/1,904.58 = 1,138.20/x
  3. Step 3: Cross multiply
    1,277.73x = 1,904.58 × 1,138.20
  4. Step 4: Simplify right side
    1,277.73x = 2,167,792.96
  5. Step 5: Solve for x
    x = 2,167,792.96/1,277.73
  6. Step 6: Final answer
    x = 1,696.60

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1.5x scale

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.