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Finding the Fourth Proportional to 321,520.69, 482,285.13 and 221,654.17

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Solution

The fourth proportional to 321,520.69, 482,285.13 and 221,654.17 is: 332,484.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,520.69 : 482,285.13 = 221,654.17 : x
  2. Step 2: Convert to fraction form
    321,520.69/482,285.13 = 221,654.17/x
  3. Step 3: Cross multiply
    321,520.69x = 482,285.13 × 221,654.17
  4. Step 4: Simplify right side
    321,520.69x = 106,900,510,193.49
  5. Step 5: Solve for x
    x = 106,900,510,193.49/321,520.69
  6. Step 6: Final answer
    x = 332,484.08

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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.