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Finding the Fourth Proportional to 383,999.27, 529,931.72 and 209,579

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Solution

The fourth proportional to 383,999.27, 529,931.72 and 209,579 is: 289,225.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,999.27 : 529,931.72 = 209,579 : x
  2. Step 2: Convert to fraction form
    383,999.27/529,931.72 = 209,579/x
  3. Step 3: Cross multiply
    383,999.27x = 529,931.72 × 209,579
  4. Step 4: Simplify right side
    383,999.27x = 111,062,558,897.99
  5. Step 5: Solve for x
    x = 111,062,558,897.99/383,999.27
  6. Step 6: Final answer
    x = 289,225.96

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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.