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Finding the Fourth Proportional to 1,289.03, 1,777.52 and 764.96

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Solution

The fourth proportional to 1,289.03, 1,777.52 and 764.96 is: 1,054.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.03 : 1,777.52 = 764.96 : x
  2. Step 2: Convert to fraction form
    1,289.03/1,777.52 = 764.96/x
  3. Step 3: Cross multiply
    1,289.03x = 1,777.52 × 764.96
  4. Step 4: Simplify right side
    1,289.03x = 1,359,727.24
  5. Step 5: Solve for x
    x = 1,359,727.24/1,289.03
  6. Step 6: Final answer
    x = 1,054.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.