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Finding the Fourth Proportional to 702.15, 1,052.55 and 629.25

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Solution

The fourth proportional to 702.15, 1,052.55 and 629.25 is: 943.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.15 : 1,052.55 = 629.25 : x
  2. Step 2: Convert to fraction form
    702.15/1,052.55 = 629.25/x
  3. Step 3: Cross multiply
    702.15x = 1,052.55 × 629.25
  4. Step 4: Simplify right side
    702.15x = 662,317.09
  5. Step 5: Solve for x
    x = 662,317.09/702.15
  6. Step 6: Final answer
    x = 943.27

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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.