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Finding the Fourth Proportional to 785.36, 1,180.92 and 753.68

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Solution

The fourth proportional to 785.36, 1,180.92 and 753.68 is: 1,133.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.36 : 1,180.92 = 753.68 : x
  2. Step 2: Convert to fraction form
    785.36/1,180.92 = 753.68/x
  3. Step 3: Cross multiply
    785.36x = 1,180.92 × 753.68
  4. Step 4: Simplify right side
    785.36x = 890,035.79
  5. Step 5: Solve for x
    x = 890,035.79/785.36
  6. Step 6: Final answer
    x = 1,133.28

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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.