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Finding the Fourth Proportional to 645,389.80, 967,754.21 and 379,230.28

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Solution

The fourth proportional to 645,389.80, 967,754.21 and 379,230.28 is: 568,651.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,389.80 : 967,754.21 = 379,230.28 : x
  2. Step 2: Convert to fraction form
    645,389.80/967,754.21 = 379,230.28/x
  3. Step 3: Cross multiply
    645,389.80x = 967,754.21 × 379,230.28
  4. Step 4: Simplify right side
    645,389.80x = 367,001,700,029.48
  5. Step 5: Solve for x
    x = 367,001,700,029.48/645,389.80
  6. Step 6: Final answer
    x = 568,651.22

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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.