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Finding the Fourth Proportional to 423,218.88, 635,006.43 and 263,428.47

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Solution

The fourth proportional to 423,218.88, 635,006.43 and 263,428.47 is: 395,253.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,218.88 : 635,006.43 = 263,428.47 : x
  2. Step 2: Convert to fraction form
    423,218.88/635,006.43 = 263,428.47/x
  3. Step 3: Cross multiply
    423,218.88x = 635,006.43 × 263,428.47
  4. Step 4: Simplify right side
    423,218.88x = 167,278,772,295.06
  5. Step 5: Solve for x
    x = 167,278,772,295.06/423,218.88
  6. Step 6: Final answer
    x = 395,253.57

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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.