Home / 2,777.40-4,149.99-2,485.80

Finding the Fourth Proportional to 2,777.40, 4,149.99 and 2,485.80

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Solution

The fourth proportional to 2,777.40, 4,149.99 and 2,485.80 is: 3,714.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.40 : 4,149.99 = 2,485.80 : x
  2. Step 2: Convert to fraction form
    2,777.40/4,149.99 = 2,485.80/x
  3. Step 3: Cross multiply
    2,777.40x = 4,149.99 × 2,485.80
  4. Step 4: Simplify right side
    2,777.40x = 10,316,045.14
  5. Step 5: Solve for x
    x = 10,316,045.14/2,777.40
  6. Step 6: Final answer
    x = 3,714.28

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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.