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Finding the Fourth Proportional to 702.34, 969.30 and 387.67

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Solution

The fourth proportional to 702.34, 969.30 and 387.67 is: 535.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.34 : 969.30 = 387.67 : x
  2. Step 2: Convert to fraction form
    702.34/969.30 = 387.67/x
  3. Step 3: Cross multiply
    702.34x = 969.30 × 387.67
  4. Step 4: Simplify right side
    702.34x = 375,768.53
  5. Step 5: Solve for x
    x = 375,768.53/702.34
  6. Step 6: Final answer
    x = 535.02

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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.