Home / 2,117.30-3,177.30-1,239.80

Finding the Fourth Proportional to 2,117.30, 3,177.30 and 1,239.80

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Solution

The fourth proportional to 2,117.30, 3,177.30 and 1,239.80 is: 1,860.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.30 : 3,177.30 = 1,239.80 : x
  2. Step 2: Convert to fraction form
    2,117.30/3,177.30 = 1,239.80/x
  3. Step 3: Cross multiply
    2,117.30x = 3,177.30 × 1,239.80
  4. Step 4: Simplify right side
    2,117.30x = 3,939,216.54
  5. Step 5: Solve for x
    x = 3,939,216.54/2,117.30
  6. Step 6: Final answer
    x = 1,860.49

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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.