Home / 1,403.43-2,104.74-429.81

Finding the Fourth Proportional to 1,403.43, 2,104.74 and 429.81

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Solution

The fourth proportional to 1,403.43, 2,104.74 and 429.81 is: 644.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.43 : 2,104.74 = 429.81 : x
  2. Step 2: Convert to fraction form
    1,403.43/2,104.74 = 429.81/x
  3. Step 3: Cross multiply
    1,403.43x = 2,104.74 × 429.81
  4. Step 4: Simplify right side
    1,403.43x = 904,638.30
  5. Step 5: Solve for x
    x = 904,638.30/1,403.43
  6. Step 6: Final answer
    x = 644.59

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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.