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Finding the Fourth Proportional to 705.43, 1,059.41 and 489.43

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Solution

The fourth proportional to 705.43, 1,059.41 and 489.43 is: 735.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.43 : 1,059.41 = 489.43 : x
  2. Step 2: Convert to fraction form
    705.43/1,059.41 = 489.43/x
  3. Step 3: Cross multiply
    705.43x = 1,059.41 × 489.43
  4. Step 4: Simplify right side
    705.43x = 518,507.04
  5. Step 5: Solve for x
    x = 518,507.04/705.43
  6. Step 6: Final answer
    x = 735.02

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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.