Home / 1,028.81-1,419.75-630.35

Finding the Fourth Proportional to 1,028.81, 1,419.75 and 630.35

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Solution

The fourth proportional to 1,028.81, 1,419.75 and 630.35 is: 869.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.81 : 1,419.75 = 630.35 : x
  2. Step 2: Convert to fraction form
    1,028.81/1,419.75 = 630.35/x
  3. Step 3: Cross multiply
    1,028.81x = 1,419.75 × 630.35
  4. Step 4: Simplify right side
    1,028.81x = 894,932.31
  5. Step 5: Solve for x
    x = 894,932.31/1,028.81
  6. Step 6: Final answer
    x = 869.88

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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.