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Finding the Fourth Proportional to 531.50, 797.18 and 257.18

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Solution

The fourth proportional to 531.50, 797.18 and 257.18 is: 385.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.50 : 797.18 = 257.18 : x
  2. Step 2: Convert to fraction form
    531.50/797.18 = 257.18/x
  3. Step 3: Cross multiply
    531.50x = 797.18 × 257.18
  4. Step 4: Simplify right side
    531.50x = 205,013.48
  5. Step 5: Solve for x
    x = 205,013.48/531.50
  6. Step 6: Final answer
    x = 385.73

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Double scale
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Similar ratio
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1.5x scale

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.