Home / 2,860.88-4,291.56-913.12

Finding the Fourth Proportional to 2,860.88, 4,291.56 and 913.12

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Solution

The fourth proportional to 2,860.88, 4,291.56 and 913.12 is: 1,369.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.88 : 4,291.56 = 913.12 : x
  2. Step 2: Convert to fraction form
    2,860.88/4,291.56 = 913.12/x
  3. Step 3: Cross multiply
    2,860.88x = 4,291.56 × 913.12
  4. Step 4: Simplify right side
    2,860.88x = 3,918,709.27
  5. Step 5: Solve for x
    x = 3,918,709.27/2,860.88
  6. Step 6: Final answer
    x = 1,369.76

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Double scale
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Similar ratio
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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.