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Finding the Fourth Proportional to 997.39, 1,376.08 and 702.82

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Solution

The fourth proportional to 997.39, 1,376.08 and 702.82 is: 969.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.39 : 1,376.08 = 702.82 : x
  2. Step 2: Convert to fraction form
    997.39/1,376.08 = 702.82/x
  3. Step 3: Cross multiply
    997.39x = 1,376.08 × 702.82
  4. Step 4: Simplify right side
    997.39x = 967,136.55
  5. Step 5: Solve for x
    x = 967,136.55/997.39
  6. Step 6: Final answer
    x = 969.67

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1.5x scale

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.