Home / 3,121.59-4,308.15-1,777.53

Finding the Fourth Proportional to 3,121.59, 4,308.15 and 1,777.53

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Solution

The fourth proportional to 3,121.59, 4,308.15 and 1,777.53 is: 2,453.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.59 : 4,308.15 = 1,777.53 : x
  2. Step 2: Convert to fraction form
    3,121.59/4,308.15 = 1,777.53/x
  3. Step 3: Cross multiply
    3,121.59x = 4,308.15 × 1,777.53
  4. Step 4: Simplify right side
    3,121.59x = 7,657,865.87
  5. Step 5: Solve for x
    x = 7,657,865.87/3,121.59
  6. Step 6: Final answer
    x = 2,453.19

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1.5x scale

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.