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Finding the Fourth Proportional to 321,205.80, 481,808.70 and 288,028.20

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Solution

The fourth proportional to 321,205.80, 481,808.70 and 288,028.20 is: 432,042.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,205.80 : 481,808.70 = 288,028.20 : x
  2. Step 2: Convert to fraction form
    321,205.80/481,808.70 = 288,028.20/x
  3. Step 3: Cross multiply
    321,205.80x = 481,808.70 × 288,028.20
  4. Step 4: Simplify right side
    321,205.80x = 138,774,492,605.34
  5. Step 5: Solve for x
    x = 138,774,492,605.34/321,205.80
  6. Step 6: Final answer
    x = 432,042.30

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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.