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Finding the Fourth Proportional to 676.20, 1,014.30 and 575.40

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Solution

The fourth proportional to 676.20, 1,014.30 and 575.40 is: 863.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.20 : 1,014.30 = 575.40 : x
  2. Step 2: Convert to fraction form
    676.20/1,014.30 = 575.40/x
  3. Step 3: Cross multiply
    676.20x = 1,014.30 × 575.40
  4. Step 4: Simplify right side
    676.20x = 583,628.22
  5. Step 5: Solve for x
    x = 583,628.22/676.20
  6. Step 6: Final answer
    x = 863.10

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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.