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Finding the Fourth Proportional to 1,485.76, 2,229 and 836.92

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Solution

The fourth proportional to 1,485.76, 2,229 and 836.92 is: 1,255.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.76 : 2,229 = 836.92 : x
  2. Step 2: Convert to fraction form
    1,485.76/2,229 = 836.92/x
  3. Step 3: Cross multiply
    1,485.76x = 2,229 × 836.92
  4. Step 4: Simplify right side
    1,485.76x = 1,865,494.68
  5. Step 5: Solve for x
    x = 1,865,494.68/1,485.76
  6. Step 6: Final answer
    x = 1,255.58

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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.