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Finding the Fourth Proportional to 702.91, 969.99 and 388.17

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Solution

The fourth proportional to 702.91, 969.99 and 388.17 is: 535.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.91 : 969.99 = 388.17 : x
  2. Step 2: Convert to fraction form
    702.91/969.99 = 388.17/x
  3. Step 3: Cross multiply
    702.91x = 969.99 × 388.17
  4. Step 4: Simplify right side
    702.91x = 376,522.47
  5. Step 5: Solve for x
    x = 376,522.47/702.91
  6. Step 6: Final answer
    x = 535.66

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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.