Home / 1,403.20-2,104.80-429.35

Finding the Fourth Proportional to 1,403.20, 2,104.80 and 429.35

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Solution

The fourth proportional to 1,403.20, 2,104.80 and 429.35 is: 644.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.20 : 2,104.80 = 429.35 : x
  2. Step 2: Convert to fraction form
    1,403.20/2,104.80 = 429.35/x
  3. Step 3: Cross multiply
    1,403.20x = 2,104.80 × 429.35
  4. Step 4: Simplify right side
    1,403.20x = 903,695.88
  5. Step 5: Solve for x
    x = 903,695.88/1,403.20
  6. Step 6: Final answer
    x = 644.03

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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.