Home / 280,309.23-420,519.24-102,817.89

Finding the Fourth Proportional to 280,309.23, 420,519.24 and 102,817.89

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Solution

The fourth proportional to 280,309.23, 420,519.24 and 102,817.89 is: 154,247.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,309.23 : 420,519.24 = 102,817.89 : x
  2. Step 2: Convert to fraction form
    280,309.23/420,519.24 = 102,817.89/x
  3. Step 3: Cross multiply
    280,309.23x = 420,519.24 × 102,817.89
  4. Step 4: Simplify right side
    280,309.23x = 43,236,900,961.20
  5. Step 5: Solve for x
    x = 43,236,900,961.20/280,309.23
  6. Step 6: Final answer
    x = 154,247.15

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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.