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Finding the Fourth Proportional to 667.73, 1,000.45 and 375.05

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Solution

The fourth proportional to 667.73, 1,000.45 and 375.05 is: 561.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.73 : 1,000.45 = 375.05 : x
  2. Step 2: Convert to fraction form
    667.73/1,000.45 = 375.05/x
  3. Step 3: Cross multiply
    667.73x = 1,000.45 × 375.05
  4. Step 4: Simplify right side
    667.73x = 375,216.11
  5. Step 5: Solve for x
    x = 375,216.11/667.73
  6. Step 6: Final answer
    x = 561.93

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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.