Home / 1,277.39-1,916.38-455.73

Finding the Fourth Proportional to 1,277.39, 1,916.38 and 455.73

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Solution

The fourth proportional to 1,277.39, 1,916.38 and 455.73 is: 683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.39 : 1,916.38 = 455.73 : x
  2. Step 2: Convert to fraction form
    1,277.39/1,916.38 = 455.73/x
  3. Step 3: Cross multiply
    1,277.39x = 1,916.38 × 455.73
  4. Step 4: Simplify right side
    1,277.39x = 873,351.86
  5. Step 5: Solve for x
    x = 873,351.86/1,277.39
  6. Step 6: Final answer
    x = 683.70

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Double scale
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1.5x scale

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.