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Finding the Fourth Proportional to 676.20, 1,014.30 and 627.60

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Solution

The fourth proportional to 676.20, 1,014.30 and 627.60 is: 941.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.20 : 1,014.30 = 627.60 : x
  2. Step 2: Convert to fraction form
    676.20/1,014.30 = 627.60/x
  3. Step 3: Cross multiply
    676.20x = 1,014.30 × 627.60
  4. Step 4: Simplify right side
    676.20x = 636,574.68
  5. Step 5: Solve for x
    x = 636,574.68/676.20
  6. Step 6: Final answer
    x = 941.40

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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.