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Finding the Fourth Proportional to 673.66, 1,001.79 and 666.46

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Solution

The fourth proportional to 673.66, 1,001.79 and 666.46 is: 991.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.66 : 1,001.79 = 666.46 : x
  2. Step 2: Convert to fraction form
    673.66/1,001.79 = 666.46/x
  3. Step 3: Cross multiply
    673.66x = 1,001.79 × 666.46
  4. Step 4: Simplify right side
    673.66x = 667,652.96
  5. Step 5: Solve for x
    x = 667,652.96/673.66
  6. Step 6: Final answer
    x = 991.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.