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Finding the Fourth Proportional to 702.72, 969.48 and 440.69

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Solution

The fourth proportional to 702.72, 969.48 and 440.69 is: 607.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.72 : 969.48 = 440.69 : x
  2. Step 2: Convert to fraction form
    702.72/969.48 = 440.69/x
  3. Step 3: Cross multiply
    702.72x = 969.48 × 440.69
  4. Step 4: Simplify right side
    702.72x = 427,235.29
  5. Step 5: Solve for x
    x = 427,235.29/702.72
  6. Step 6: Final answer
    x = 607.97

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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.