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Finding the Fourth Proportional to 702.34, 969.38 and 439.90

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Solution

The fourth proportional to 702.34, 969.38 and 439.90 is: 607.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.34 : 969.38 = 439.90 : x
  2. Step 2: Convert to fraction form
    702.34/969.38 = 439.90/x
  3. Step 3: Cross multiply
    702.34x = 969.38 × 439.90
  4. Step 4: Simplify right side
    702.34x = 426,430.26
  5. Step 5: Solve for x
    x = 426,430.26/702.34
  6. Step 6: Final answer
    x = 607.16

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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.