Home / 1,285.35-1,916.74-1,273.66

Finding the Fourth Proportional to 1,285.35, 1,916.74 and 1,273.66

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Solution

The fourth proportional to 1,285.35, 1,916.74 and 1,273.66 is: 1,899.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.35 : 1,916.74 = 1,273.66 : x
  2. Step 2: Convert to fraction form
    1,285.35/1,916.74 = 1,273.66/x
  3. Step 3: Cross multiply
    1,285.35x = 1,916.74 × 1,273.66
  4. Step 4: Simplify right side
    1,285.35x = 2,441,267.09
  5. Step 5: Solve for x
    x = 2,441,267.09/1,285.35
  6. Step 6: Final answer
    x = 1,899.30

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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.