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Finding the Fourth Proportional to 668.53, 1,001.94 and 581.50

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Solution

The fourth proportional to 668.53, 1,001.94 and 581.50 is: 871.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.53 : 1,001.94 = 581.50 : x
  2. Step 2: Convert to fraction form
    668.53/1,001.94 = 581.50/x
  3. Step 3: Cross multiply
    668.53x = 1,001.94 × 581.50
  4. Step 4: Simplify right side
    668.53x = 582,628.11
  5. Step 5: Solve for x
    x = 582,628.11/668.53
  6. Step 6: Final answer
    x = 871.51

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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.