Home / 2,948.80-4,407.36-2,121.60

Finding the Fourth Proportional to 2,948.80, 4,407.36 and 2,121.60

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Solution

The fourth proportional to 2,948.80, 4,407.36 and 2,121.60 is: 3,171.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,948.80 : 4,407.36 = 2,121.60 : x
  2. Step 2: Convert to fraction form
    2,948.80/4,407.36 = 2,121.60/x
  3. Step 3: Cross multiply
    2,948.80x = 4,407.36 × 2,121.60
  4. Step 4: Simplify right side
    2,948.80x = 9,350,654.98
  5. Step 5: Solve for x
    x = 9,350,654.98/2,948.80
  6. Step 6: Final answer
    x = 3,171.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.