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Finding the Fourth Proportional to 702.85, 1,052.90 and 539.74

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Solution

The fourth proportional to 702.85, 1,052.90 and 539.74 is: 808.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.85 : 1,052.90 = 539.74 : x
  2. Step 2: Convert to fraction form
    702.85/1,052.90 = 539.74/x
  3. Step 3: Cross multiply
    702.85x = 1,052.90 × 539.74
  4. Step 4: Simplify right side
    702.85x = 568,292.25
  5. Step 5: Solve for x
    x = 568,292.25/702.85
  6. Step 6: Final answer
    x = 808.55

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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.