Home / 3,140.80-4,710.60-949.60

Finding the Fourth Proportional to 3,140.80, 4,710.60 and 949.60

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Solution

The fourth proportional to 3,140.80, 4,710.60 and 949.60 is: 1,424.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.80 : 4,710.60 = 949.60 : x
  2. Step 2: Convert to fraction form
    3,140.80/4,710.60 = 949.60/x
  3. Step 3: Cross multiply
    3,140.80x = 4,710.60 × 949.60
  4. Step 4: Simplify right side
    3,140.80x = 4,473,185.76
  5. Step 5: Solve for x
    x = 4,473,185.76/3,140.80
  6. Step 6: Final answer
    x = 1,424.22

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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.