Home / 1,771.16-2,443.75-1,211.80

Finding the Fourth Proportional to 1,771.16, 2,443.75 and 1,211.80

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Solution

The fourth proportional to 1,771.16, 2,443.75 and 1,211.80 is: 1,671.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.16 : 2,443.75 = 1,211.80 : x
  2. Step 2: Convert to fraction form
    1,771.16/2,443.75 = 1,211.80/x
  3. Step 3: Cross multiply
    1,771.16x = 2,443.75 × 1,211.80
  4. Step 4: Simplify right side
    1,771.16x = 2,961,336.25
  5. Step 5: Solve for x
    x = 2,961,336.25/1,771.16
  6. Step 6: Final answer
    x = 1,671.98

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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.