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Finding the Fourth Proportional to 645,388.80, 967,752.71 and 379,229.28

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Solution

The fourth proportional to 645,388.80, 967,752.71 and 379,229.28 is: 568,649.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,388.80 : 967,752.71 = 379,229.28 : x
  2. Step 2: Convert to fraction form
    645,388.80/967,752.71 = 379,229.28/x
  3. Step 3: Cross multiply
    645,388.80x = 967,752.71 × 379,229.28
  4. Step 4: Simplify right side
    645,388.80x = 367,000,163,431.35
  5. Step 5: Solve for x
    x = 367,000,163,431.35/645,388.80
  6. Step 6: Final answer
    x = 568,649.72

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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.