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Finding the Fourth Proportional to 702.28, 968.58 and 515.56

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Solution

The fourth proportional to 702.28, 968.58 and 515.56 is: 711.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.28 : 968.58 = 515.56 : x
  2. Step 2: Convert to fraction form
    702.28/968.58 = 515.56/x
  3. Step 3: Cross multiply
    702.28x = 968.58 × 515.56
  4. Step 4: Simplify right side
    702.28x = 499,361.10
  5. Step 5: Solve for x
    x = 499,361.10/702.28
  6. Step 6: Final answer
    x = 711.06

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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.