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Finding the Fourth Proportional to 531.80, 797.70 and 219.45

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Solution

The fourth proportional to 531.80, 797.70 and 219.45 is: 329.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.80 : 797.70 = 219.45 : x
  2. Step 2: Convert to fraction form
    531.80/797.70 = 219.45/x
  3. Step 3: Cross multiply
    531.80x = 797.70 × 219.45
  4. Step 4: Simplify right side
    531.80x = 175,055.27
  5. Step 5: Solve for x
    x = 175,055.27/531.80
  6. Step 6: Final answer
    x = 329.18

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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.