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Finding the Fourth Proportional to 1,021.33, 1,408.04 and 702.29

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Solution

The fourth proportional to 1,021.33, 1,408.04 and 702.29 is: 968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.33 : 1,408.04 = 702.29 : x
  2. Step 2: Convert to fraction form
    1,021.33/1,408.04 = 702.29/x
  3. Step 3: Cross multiply
    1,021.33x = 1,408.04 × 702.29
  4. Step 4: Simplify right side
    1,021.33x = 988,852.41
  5. Step 5: Solve for x
    x = 988,852.41/1,021.33
  6. Step 6: Final answer
    x = 968.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.