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Finding the Fourth Proportional to 676.20, 1,014.30 and 243.40

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Solution

The fourth proportional to 676.20, 1,014.30 and 243.40 is: 365.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.20 : 1,014.30 = 243.40 : x
  2. Step 2: Convert to fraction form
    676.20/1,014.30 = 243.40/x
  3. Step 3: Cross multiply
    676.20x = 1,014.30 × 243.40
  4. Step 4: Simplify right side
    676.20x = 246,880.62
  5. Step 5: Solve for x
    x = 246,880.62/676.20
  6. Step 6: Final answer
    x = 365.10

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1.5x scale

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.