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Finding the Fourth Proportional to 702.15, 968.81 and 422.30

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Solution

The fourth proportional to 702.15, 968.81 and 422.30 is: 582.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.15 : 968.81 = 422.30 : x
  2. Step 2: Convert to fraction form
    702.15/968.81 = 422.30/x
  3. Step 3: Cross multiply
    702.15x = 968.81 × 422.30
  4. Step 4: Simplify right side
    702.15x = 409,121.51
  5. Step 5: Solve for x
    x = 409,121.51/702.15
  6. Step 6: Final answer
    x = 582.67

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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.