Home / 1,403.90-2,105.83-429.97

Finding the Fourth Proportional to 1,403.90, 2,105.83 and 429.97

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Solution

The fourth proportional to 1,403.90, 2,105.83 and 429.97 is: 644.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.90 : 2,105.83 = 429.97 : x
  2. Step 2: Convert to fraction form
    1,403.90/2,105.83 = 429.97/x
  3. Step 3: Cross multiply
    1,403.90x = 2,105.83 × 429.97
  4. Step 4: Simplify right side
    1,403.90x = 905,443.73
  5. Step 5: Solve for x
    x = 905,443.73/1,403.90
  6. Step 6: Final answer
    x = 644.95

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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.