Home / 2,860.80-4,291.20-2,666.40

Finding the Fourth Proportional to 2,860.80, 4,291.20 and 2,666.40

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Solution

The fourth proportional to 2,860.80, 4,291.20 and 2,666.40 is: 3,999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.80 : 4,291.20 = 2,666.40 : x
  2. Step 2: Convert to fraction form
    2,860.80/4,291.20 = 2,666.40/x
  3. Step 3: Cross multiply
    2,860.80x = 4,291.20 × 2,666.40
  4. Step 4: Simplify right side
    2,860.80x = 11,442,055.68
  5. Step 5: Solve for x
    x = 11,442,055.68/2,860.80
  6. Step 6: Final answer
    x = 3,999.60

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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.