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Finding the Fourth Proportional to 505.78, 759.24 and 493.90

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Solution

The fourth proportional to 505.78, 759.24 and 493.90 is: 741.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.78 : 759.24 = 493.90 : x
  2. Step 2: Convert to fraction form
    505.78/759.24 = 493.90/x
  3. Step 3: Cross multiply
    505.78x = 759.24 × 493.90
  4. Step 4: Simplify right side
    505.78x = 374,988.64
  5. Step 5: Solve for x
    x = 374,988.64/505.78
  6. Step 6: Final answer
    x = 741.41

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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.