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Finding the Fourth Proportional to 667.93, 1,003.34 and 646.06

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Solution

The fourth proportional to 667.93, 1,003.34 and 646.06 is: 970.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.93 : 1,003.34 = 646.06 : x
  2. Step 2: Convert to fraction form
    667.93/1,003.34 = 646.06/x
  3. Step 3: Cross multiply
    667.93x = 1,003.34 × 646.06
  4. Step 4: Simplify right side
    667.93x = 648,216.95
  5. Step 5: Solve for x
    x = 648,216.95/667.93
  6. Step 6: Final answer
    x = 970.49

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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.