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Finding the Fourth Proportional to 431,751.40, 647,627.10 and 274,287.40

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Solution

The fourth proportional to 431,751.40, 647,627.10 and 274,287.40 is: 411,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,751.40 : 647,627.10 = 274,287.40 : x
  2. Step 2: Convert to fraction form
    431,751.40/647,627.10 = 274,287.40/x
  3. Step 3: Cross multiply
    431,751.40x = 647,627.10 × 274,287.40
  4. Step 4: Simplify right side
    431,751.40x = 177,635,953,428.54
  5. Step 5: Solve for x
    x = 177,635,953,428.54/431,751.40
  6. Step 6: Final answer
    x = 411,431.10

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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.