Home / 1,276.11-1,914.60-928.85

Finding the Fourth Proportional to 1,276.11, 1,914.60 and 928.85

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Solution

The fourth proportional to 1,276.11, 1,914.60 and 928.85 is: 1,393.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.11 : 1,914.60 = 928.85 : x
  2. Step 2: Convert to fraction form
    1,276.11/1,914.60 = 928.85/x
  3. Step 3: Cross multiply
    1,276.11x = 1,914.60 × 928.85
  4. Step 4: Simplify right side
    1,276.11x = 1,778,366.64
  5. Step 5: Solve for x
    x = 1,778,366.64/1,276.11
  6. Step 6: Final answer
    x = 1,393.58

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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.