Home / 2,143.80-3,211.65-1,277.10

Finding the Fourth Proportional to 2,143.80, 3,211.65 and 1,277.10

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Solution

The fourth proportional to 2,143.80, 3,211.65 and 1,277.10 is: 1,913.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.80 : 3,211.65 = 1,277.10 : x
  2. Step 2: Convert to fraction form
    2,143.80/3,211.65 = 1,277.10/x
  3. Step 3: Cross multiply
    2,143.80x = 3,211.65 × 1,277.10
  4. Step 4: Simplify right side
    2,143.80x = 4,101,598.22
  5. Step 5: Solve for x
    x = 4,101,598.22/2,143.80
  6. Step 6: Final answer
    x = 1,913.24

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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.