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Finding the Fourth Proportional to 423,568.35, 635,431.23 and 139,274.82

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Solution

The fourth proportional to 423,568.35, 635,431.23 and 139,274.82 is: 208,938.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,568.35 : 635,431.23 = 139,274.82 : x
  2. Step 2: Convert to fraction form
    423,568.35/635,431.23 = 139,274.82/x
  3. Step 3: Cross multiply
    423,568.35x = 635,431.23 × 139,274.82
  4. Step 4: Simplify right side
    423,568.35x = 88,499,570,180.63
  5. Step 5: Solve for x
    x = 88,499,570,180.63/423,568.35
  6. Step 6: Final answer
    x = 208,938.11

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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.