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Finding the Fourth Proportional to 468.36, 702.54 and 139.29

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Solution

The fourth proportional to 468.36, 702.54 and 139.29 is: 208.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.36 : 702.54 = 139.29 : x
  2. Step 2: Convert to fraction form
    468.36/702.54 = 139.29/x
  3. Step 3: Cross multiply
    468.36x = 702.54 × 139.29
  4. Step 4: Simplify right side
    468.36x = 97,856.80
  5. Step 5: Solve for x
    x = 97,856.80/468.36
  6. Step 6: Final answer
    x = 208.94

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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.