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Finding the Fourth Proportional to 703.20, 970.56 and 636.48

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Solution

The fourth proportional to 703.20, 970.56 and 636.48 is: 878.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.20 : 970.56 = 636.48 : x
  2. Step 2: Convert to fraction form
    703.20/970.56 = 636.48/x
  3. Step 3: Cross multiply
    703.20x = 970.56 × 636.48
  4. Step 4: Simplify right side
    703.20x = 617,742.03
  5. Step 5: Solve for x
    x = 617,742.03/703.20
  6. Step 6: Final answer
    x = 878.47

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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.