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Finding the Fourth Proportional to 321,211.80, 481,817.70 and 288,034.20

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Solution

The fourth proportional to 321,211.80, 481,817.70 and 288,034.20 is: 432,051.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,211.80 : 481,817.70 = 288,034.20 : x
  2. Step 2: Convert to fraction form
    321,211.80/481,817.70 = 288,034.20/x
  3. Step 3: Cross multiply
    321,211.80x = 481,817.70 × 288,034.20
  4. Step 4: Simplify right side
    321,211.80x = 138,779,975,765.34
  5. Step 5: Solve for x
    x = 138,779,975,765.34/321,211.80
  6. Step 6: Final answer
    x = 432,051.30

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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.