Home / 1,403.58-2,105.27-429.63

Finding the Fourth Proportional to 1,403.58, 2,105.27 and 429.63

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Solution

The fourth proportional to 1,403.58, 2,105.27 and 429.63 is: 644.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.58 : 2,105.27 = 429.63 : x
  2. Step 2: Convert to fraction form
    1,403.58/2,105.27 = 429.63/x
  3. Step 3: Cross multiply
    1,403.58x = 2,105.27 × 429.63
  4. Step 4: Simplify right side
    1,403.58x = 904,487.15
  5. Step 5: Solve for x
    x = 904,487.15/1,403.58
  6. Step 6: Final answer
    x = 644.41

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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.