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Finding the Fourth Proportional to 2,590.11, 3,885.81 and 835.28

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Solution

The fourth proportional to 2,590.11, 3,885.81 and 835.28 is: 1,253.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590.11 : 3,885.81 = 835.28 : x
  2. Step 2: Convert to fraction form
    2,590.11/3,885.81 = 835.28/x
  3. Step 3: Cross multiply
    2,590.11x = 3,885.81 × 835.28
  4. Step 4: Simplify right side
    2,590.11x = 3,245,719.95
  5. Step 5: Solve for x
    x = 3,245,719.95/2,590.11
  6. Step 6: Final answer
    x = 1,253.12

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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.