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Finding the Fourth Proportional to 531.66, 796.78 and 393.59

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Solution

The fourth proportional to 531.66, 796.78 and 393.59 is: 589.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.66 : 796.78 = 393.59 : x
  2. Step 2: Convert to fraction form
    531.66/796.78 = 393.59/x
  3. Step 3: Cross multiply
    531.66x = 796.78 × 393.59
  4. Step 4: Simplify right side
    531.66x = 313,598.69
  5. Step 5: Solve for x
    x = 313,598.69/531.66
  6. Step 6: Final answer
    x = 589.85

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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.