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Finding the Fourth Proportional to 644,748.48, 966,870 and 378,576

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Solution

The fourth proportional to 644,748.48, 966,870 and 378,576 is: 567,715.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,748.48 : 966,870 = 378,576 : x
  2. Step 2: Convert to fraction form
    644,748.48/966,870 = 378,576/x
  3. Step 3: Cross multiply
    644,748.48x = 966,870 × 378,576
  4. Step 4: Simplify right side
    644,748.48x = 366,033,777,120
  5. Step 5: Solve for x
    x = 366,033,777,120/644,748.48
  6. Step 6: Final answer
    x = 567,715.61

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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.