Home / 1,946.80-2,686.50-1,160.80

Finding the Fourth Proportional to 1,946.80, 2,686.50 and 1,160.80

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Solution

The fourth proportional to 1,946.80, 2,686.50 and 1,160.80 is: 1,601.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.80 : 2,686.50 = 1,160.80 : x
  2. Step 2: Convert to fraction form
    1,946.80/2,686.50 = 1,160.80/x
  3. Step 3: Cross multiply
    1,946.80x = 2,686.50 × 1,160.80
  4. Step 4: Simplify right side
    1,946.80x = 3,118,489.20
  5. Step 5: Solve for x
    x = 3,118,489.20/1,946.80
  6. Step 6: Final answer
    x = 1,601.85

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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.