Home / 1,284.18-1,784.46-1,270.80

Finding the Fourth Proportional to 1,284.18, 1,784.46 and 1,270.80

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Solution

The fourth proportional to 1,284.18, 1,784.46 and 1,270.80 is: 1,765.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.18 : 1,784.46 = 1,270.80 : x
  2. Step 2: Convert to fraction form
    1,284.18/1,784.46 = 1,270.80/x
  3. Step 3: Cross multiply
    1,284.18x = 1,784.46 × 1,270.80
  4. Step 4: Simplify right side
    1,284.18x = 2,267,691.77
  5. Step 5: Solve for x
    x = 2,267,691.77/1,284.18
  6. Step 6: Final answer
    x = 1,765.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.