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Finding the Fourth Proportional to 479,662.69, 719,640.65 and 287,749.80

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Solution

The fourth proportional to 479,662.69, 719,640.65 and 287,749.80 is: 431,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,662.69 : 719,640.65 = 287,749.80 : x
  2. Step 2: Convert to fraction form
    479,662.69/719,640.65 = 287,749.80/x
  3. Step 3: Cross multiply
    479,662.69x = 719,640.65 × 287,749.80
  4. Step 4: Simplify right side
    479,662.69x = 207,076,453,109.37
  5. Step 5: Solve for x
    x = 207,076,453,109.37/479,662.69
  6. Step 6: Final answer
    x = 431,712.65

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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.