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Finding the Fourth Proportional to 571,442.43, 857,636.59 and 287,214.45

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Solution

The fourth proportional to 571,442.43, 857,636.59 and 287,214.45 is: 431,059.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,442.43 : 857,636.59 = 287,214.45 : x
  2. Step 2: Convert to fraction form
    571,442.43/857,636.59 = 287,214.45/x
  3. Step 3: Cross multiply
    571,442.43x = 857,636.59 × 287,214.45
  4. Step 4: Simplify right side
    571,442.43x = 246,325,621,496.73
  5. Step 5: Solve for x
    x = 246,325,621,496.73/571,442.43
  6. Step 6: Final answer
    x = 431,059.38

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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.