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Finding the Fourth Proportional to 2,777.81, 4,165.70 and 928.51

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Solution

The fourth proportional to 2,777.81, 4,165.70 and 928.51 is: 1,392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.81 : 4,165.70 = 928.51 : x
  2. Step 2: Convert to fraction form
    2,777.81/4,165.70 = 928.51/x
  3. Step 3: Cross multiply
    2,777.81x = 4,165.70 × 928.51
  4. Step 4: Simplify right side
    2,777.81x = 3,867,879.05
  5. Step 5: Solve for x
    x = 3,867,879.05/2,777.81
  6. Step 6: Final answer
    x = 1,392.42

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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.