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Finding the Fourth Proportional to 669,661.12, 923,871.90 and 379,206.01

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Solution

The fourth proportional to 669,661.12, 923,871.90 and 379,206.01 is: 523,156.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,661.12 : 923,871.90 = 379,206.01 : x
  2. Step 2: Convert to fraction form
    669,661.12/923,871.90 = 379,206.01/x
  3. Step 3: Cross multiply
    669,661.12x = 923,871.90 × 379,206.01
  4. Step 4: Simplify right side
    669,661.12x = 350,337,776,950.12
  5. Step 5: Solve for x
    x = 350,337,776,950.12/669,661.12
  6. Step 6: Final answer
    x = 523,156.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.