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Finding the Fourth Proportional to 764.83, 1,147.27 and 724.84

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Solution

The fourth proportional to 764.83, 1,147.27 and 724.84 is: 1,087.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.83 : 1,147.27 = 724.84 : x
  2. Step 2: Convert to fraction form
    764.83/1,147.27 = 724.84/x
  3. Step 3: Cross multiply
    764.83x = 1,147.27 × 724.84
  4. Step 4: Simplify right side
    764.83x = 831,587.19
  5. Step 5: Solve for x
    x = 831,587.19/764.83
  6. Step 6: Final answer
    x = 1,087.28

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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.