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Finding the Fourth Proportional to 702.38, 1,053.56 and 394.23

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Solution

The fourth proportional to 702.38, 1,053.56 and 394.23 is: 591.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.38 : 1,053.56 = 394.23 : x
  2. Step 2: Convert to fraction form
    702.38/1,053.56 = 394.23/x
  3. Step 3: Cross multiply
    702.38x = 1,053.56 × 394.23
  4. Step 4: Simplify right side
    702.38x = 415,344.96
  5. Step 5: Solve for x
    x = 415,344.96/702.38
  6. Step 6: Final answer
    x = 591.34

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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.