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Finding the Fourth Proportional to 644,808.70, 966,982.65 and 289,992.70

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Solution

The fourth proportional to 644,808.70, 966,982.65 and 289,992.70 is: 434,885.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,808.70 : 966,982.65 = 289,992.70 : x
  2. Step 2: Convert to fraction form
    644,808.70/966,982.65 = 289,992.70/x
  3. Step 3: Cross multiply
    644,808.70x = 966,982.65 × 289,992.70
  4. Step 4: Simplify right side
    644,808.70x = 280,417,909,526.66
  5. Step 5: Solve for x
    x = 280,417,909,526.66/644,808.70
  6. Step 6: Final answer
    x = 434,885.43

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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.