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Finding the Fourth Proportional to 328,649.40, 453,812.72 and 208,003.56

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Solution

The fourth proportional to 328,649.40, 453,812.72 and 208,003.56 is: 287,219.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,649.40 : 453,812.72 = 208,003.56 : x
  2. Step 2: Convert to fraction form
    328,649.40/453,812.72 = 208,003.56/x
  3. Step 3: Cross multiply
    328,649.40x = 453,812.72 × 208,003.56
  4. Step 4: Simplify right side
    328,649.40x = 94,394,661,333.28
  5. Step 5: Solve for x
    x = 94,394,661,333.28/328,649.40
  6. Step 6: Final answer
    x = 287,219.94

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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.