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Finding the Fourth Proportional to 702.36, 968.87 and 515.58

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Solution

The fourth proportional to 702.36, 968.87 and 515.58 is: 711.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.36 : 968.87 = 515.58 : x
  2. Step 2: Convert to fraction form
    702.36/968.87 = 515.58/x
  3. Step 3: Cross multiply
    702.36x = 968.87 × 515.58
  4. Step 4: Simplify right side
    702.36x = 499,527.42
  5. Step 5: Solve for x
    x = 499,527.42/702.36
  6. Step 6: Final answer
    x = 711.21

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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.