Home / 1,403.45-2,104.77-429.34

Finding the Fourth Proportional to 1,403.45, 2,104.77 and 429.34

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Solution

The fourth proportional to 1,403.45, 2,104.77 and 429.34 is: 643.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.45 : 2,104.77 = 429.34 : x
  2. Step 2: Convert to fraction form
    1,403.45/2,104.77 = 429.34/x
  3. Step 3: Cross multiply
    1,403.45x = 2,104.77 × 429.34
  4. Step 4: Simplify right side
    1,403.45x = 903,661.95
  5. Step 5: Solve for x
    x = 903,661.95/1,403.45
  6. Step 6: Final answer
    x = 643.89

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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.