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Finding the Fourth Proportional to 772.03, 1,157.29 and 493.53

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Solution

The fourth proportional to 772.03, 1,157.29 and 493.53 is: 739.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.03 : 1,157.29 = 493.53 : x
  2. Step 2: Convert to fraction form
    772.03/1,157.29 = 493.53/x
  3. Step 3: Cross multiply
    772.03x = 1,157.29 × 493.53
  4. Step 4: Simplify right side
    772.03x = 571,157.33
  5. Step 5: Solve for x
    x = 571,157.33/772.03
  6. Step 6: Final answer
    x = 739.81

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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.