Home / 1,403.36-2,105.05-429.48

Finding the Fourth Proportional to 1,403.36, 2,105.05 and 429.48

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Solution

The fourth proportional to 1,403.36, 2,105.05 and 429.48 is: 644.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.36 : 2,105.05 = 429.48 : x
  2. Step 2: Convert to fraction form
    1,403.36/2,105.05 = 429.48/x
  3. Step 3: Cross multiply
    1,403.36x = 2,105.05 × 429.48
  4. Step 4: Simplify right side
    1,403.36x = 904,076.87
  5. Step 5: Solve for x
    x = 904,076.87/1,403.36
  6. Step 6: Final answer
    x = 644.22

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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.