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Finding the Fourth Proportional to 644,802.10, 966,911.55 and 289,633.30

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Solution

The fourth proportional to 644,802.10, 966,911.55 and 289,633.30 is: 434,318.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,802.10 : 966,911.55 = 289,633.30 : x
  2. Step 2: Convert to fraction form
    644,802.10/966,911.55 = 289,633.30/x
  3. Step 3: Cross multiply
    644,802.10x = 966,911.55 × 289,633.30
  4. Step 4: Simplify right side
    644,802.10x = 280,049,783,034.62
  5. Step 5: Solve for x
    x = 280,049,783,034.62/644,802.10
  6. Step 6: Final answer
    x = 434,318.97

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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.