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Finding the Fourth Proportional to 2,809.86, 4,215.63 and 835.55

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Solution

The fourth proportional to 2,809.86, 4,215.63 and 835.55 is: 1,253.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.86 : 4,215.63 = 835.55 : x
  2. Step 2: Convert to fraction form
    2,809.86/4,215.63 = 835.55/x
  3. Step 3: Cross multiply
    2,809.86x = 4,215.63 × 835.55
  4. Step 4: Simplify right side
    2,809.86x = 3,522,362.81
  5. Step 5: Solve for x
    x = 3,522,362.81/2,809.86
  6. Step 6: Final answer
    x = 1,253.57

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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.