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Finding the Fourth Proportional to 531.87, 797.39 and 257.68

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Solution

The fourth proportional to 531.87, 797.39 and 257.68 is: 386.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.87 : 797.39 = 257.68 : x
  2. Step 2: Convert to fraction form
    531.87/797.39 = 257.68/x
  3. Step 3: Cross multiply
    531.87x = 797.39 × 257.68
  4. Step 4: Simplify right side
    531.87x = 205,471.46
  5. Step 5: Solve for x
    x = 205,471.46/531.87
  6. Step 6: Final answer
    x = 386.32

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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.