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Finding the Fourth Proportional to 531.56, 796.35 and 491.78

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Solution

The fourth proportional to 531.56, 796.35 and 491.78 is: 736.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.56 : 796.35 = 491.78 : x
  2. Step 2: Convert to fraction form
    531.56/796.35 = 491.78/x
  3. Step 3: Cross multiply
    531.56x = 796.35 × 491.78
  4. Step 4: Simplify right side
    531.56x = 391,632.84
  5. Step 5: Solve for x
    x = 391,632.84/531.56
  6. Step 6: Final answer
    x = 736.76

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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.