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Finding the Fourth Proportional to 2,086.57, 3,130.14 and 854.15

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Solution

The fourth proportional to 2,086.57, 3,130.14 and 854.15 is: 1,281.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.57 : 3,130.14 = 854.15 : x
  2. Step 2: Convert to fraction form
    2,086.57/3,130.14 = 854.15/x
  3. Step 3: Cross multiply
    2,086.57x = 3,130.14 × 854.15
  4. Step 4: Simplify right side
    2,086.57x = 2,673,609.08
  5. Step 5: Solve for x
    x = 2,673,609.08/2,086.57
  6. Step 6: Final answer
    x = 1,281.34

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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.