Home / 1,403.10-2,104.88-428.97

Finding the Fourth Proportional to 1,403.10, 2,104.88 and 428.97

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Solution

The fourth proportional to 1,403.10, 2,104.88 and 428.97 is: 643.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.10 : 2,104.88 = 428.97 : x
  2. Step 2: Convert to fraction form
    1,403.10/2,104.88 = 428.97/x
  3. Step 3: Cross multiply
    1,403.10x = 2,104.88 × 428.97
  4. Step 4: Simplify right side
    1,403.10x = 902,930.37
  5. Step 5: Solve for x
    x = 902,930.37/1,403.10
  6. Step 6: Final answer
    x = 643.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.