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Finding the Fourth Proportional to 880.66, 1,319.37 and 636.58

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Solution

The fourth proportional to 880.66, 1,319.37 and 636.58 is: 953.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.66 : 1,319.37 = 636.58 : x
  2. Step 2: Convert to fraction form
    880.66/1,319.37 = 636.58/x
  3. Step 3: Cross multiply
    880.66x = 1,319.37 × 636.58
  4. Step 4: Simplify right side
    880.66x = 839,884.55
  5. Step 5: Solve for x
    x = 839,884.55/880.66
  6. Step 6: Final answer
    x = 953.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.