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Finding the Fourth Proportional to 706.25, 1,059.48 and 219.18

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Solution

The fourth proportional to 706.25, 1,059.48 and 219.18 is: 328.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.25 : 1,059.48 = 219.18 : x
  2. Step 2: Convert to fraction form
    706.25/1,059.48 = 219.18/x
  3. Step 3: Cross multiply
    706.25x = 1,059.48 × 219.18
  4. Step 4: Simplify right side
    706.25x = 232,216.28
  5. Step 5: Solve for x
    x = 232,216.28/706.25
  6. Step 6: Final answer
    x = 328.80

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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.