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Finding the Fourth Proportional to 531.25, 797.00 and 257.20

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Solution

The fourth proportional to 531.25, 797.00 and 257.20 is: 385.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.25 : 797.00 = 257.20 : x
  2. Step 2: Convert to fraction form
    531.25/797.00 = 257.20/x
  3. Step 3: Cross multiply
    531.25x = 797.00 × 257.20
  4. Step 4: Simplify right side
    531.25x = 204,985.12
  5. Step 5: Solve for x
    x = 204,985.12/531.25
  6. Step 6: Final answer
    x = 385.86

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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.