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Finding the Fourth Proportional to 669,663.12, 923,874.66 and 379,208.01

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Solution

The fourth proportional to 669,663.12, 923,874.66 and 379,208.01 is: 523,159.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,663.12 : 923,874.66 = 379,208.01 : x
  2. Step 2: Convert to fraction form
    669,663.12/923,874.66 = 379,208.01/x
  3. Step 3: Cross multiply
    669,663.12x = 923,874.66 × 379,208.01
  4. Step 4: Simplify right side
    669,663.12x = 350,340,671,308.03
  5. Step 5: Solve for x
    x = 350,340,671,308.03/669,663.12
  6. Step 6: Final answer
    x = 523,159.57

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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.