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Finding the Fourth Proportional to 667.40, 1,002.28 and 577.58

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Solution

The fourth proportional to 667.40, 1,002.28 and 577.58 is: 867.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.40 : 1,002.28 = 577.58 : x
  2. Step 2: Convert to fraction form
    667.40/1,002.28 = 577.58/x
  3. Step 3: Cross multiply
    667.40x = 1,002.28 × 577.58
  4. Step 4: Simplify right side
    667.40x = 578,896.88
  5. Step 5: Solve for x
    x = 578,896.88/667.40
  6. Step 6: Final answer
    x = 867.39

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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.