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Finding the Fourth Proportional to 702.20, 968.42 and 453.40

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Solution

The fourth proportional to 702.20, 968.42 and 453.40 is: 625.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.20 : 968.42 = 453.40 : x
  2. Step 2: Convert to fraction form
    702.20/968.42 = 453.40/x
  3. Step 3: Cross multiply
    702.20x = 968.42 × 453.40
  4. Step 4: Simplify right side
    702.20x = 439,080.34
  5. Step 5: Solve for x
    x = 439,080.34/702.20
  6. Step 6: Final answer
    x = 625.29

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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.