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Finding the Fourth Proportional to 705.90, 1,052.84 and 693.59

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Solution

The fourth proportional to 705.90, 1,052.84 and 693.59 is: 1,034.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.90 : 1,052.84 = 693.59 : x
  2. Step 2: Convert to fraction form
    705.90/1,052.84 = 693.59/x
  3. Step 3: Cross multiply
    705.90x = 1,052.84 × 693.59
  4. Step 4: Simplify right side
    705.90x = 730,230.56
  5. Step 5: Solve for x
    x = 730,230.56/705.90
  6. Step 6: Final answer
    x = 1,034.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.