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Finding the Fourth Proportional to 321,205.90, 481,808.85 and 215,452.30

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Solution

The fourth proportional to 321,205.90, 481,808.85 and 215,452.30 is: 323,178.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,205.90 : 481,808.85 = 215,452.30 : x
  2. Step 2: Convert to fraction form
    321,205.90/481,808.85 = 215,452.30/x
  3. Step 3: Cross multiply
    321,205.90x = 481,808.85 × 215,452.30
  4. Step 4: Simplify right side
    321,205.90x = 103,806,824,892.86
  5. Step 5: Solve for x
    x = 103,806,824,892.86/321,205.90
  6. Step 6: Final answer
    x = 323,178.45

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1.5x scale

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.