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Finding the Fourth Proportional to 1,014.30, 1,400.20 and 679.09

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Solution

The fourth proportional to 1,014.30, 1,400.20 and 679.09 is: 937.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.30 : 1,400.20 = 679.09 : x
  2. Step 2: Convert to fraction form
    1,014.30/1,400.20 = 679.09/x
  3. Step 3: Cross multiply
    1,014.30x = 1,400.20 × 679.09
  4. Step 4: Simplify right side
    1,014.30x = 950,861.82
  5. Step 5: Solve for x
    x = 950,861.82/1,014.30
  6. Step 6: Final answer
    x = 937.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.