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Finding the Fourth Proportional to 1,028.04, 1,419.27 and 679.34

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Solution

The fourth proportional to 1,028.04, 1,419.27 and 679.34 is: 937.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.04 : 1,419.27 = 679.34 : x
  2. Step 2: Convert to fraction form
    1,028.04/1,419.27 = 679.34/x
  3. Step 3: Cross multiply
    1,028.04x = 1,419.27 × 679.34
  4. Step 4: Simplify right side
    1,028.04x = 964,159.79
  5. Step 5: Solve for x
    x = 964,159.79/1,028.04
  6. Step 6: Final answer
    x = 937.86

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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.