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Finding the Fourth Proportional to 673.99, 1,005.37 and 662.84

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Solution

The fourth proportional to 673.99, 1,005.37 and 662.84 is: 988.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.99 : 1,005.37 = 662.84 : x
  2. Step 2: Convert to fraction form
    673.99/1,005.37 = 662.84/x
  3. Step 3: Cross multiply
    673.99x = 1,005.37 × 662.84
  4. Step 4: Simplify right side
    673.99x = 666,399.45
  5. Step 5: Solve for x
    x = 666,399.45/673.99
  6. Step 6: Final answer
    x = 988.74

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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.