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Finding the Fourth Proportional to 702.12, 1,053.27 and 239.77

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Solution

The fourth proportional to 702.12, 1,053.27 and 239.77 is: 359.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.12 : 1,053.27 = 239.77 : x
  2. Step 2: Convert to fraction form
    702.12/1,053.27 = 239.77/x
  3. Step 3: Cross multiply
    702.12x = 1,053.27 × 239.77
  4. Step 4: Simplify right side
    702.12x = 252,542.55
  5. Step 5: Solve for x
    x = 252,542.55/702.12
  6. Step 6: Final answer
    x = 359.69

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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.