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Finding the Fourth Proportional to 571,104.99, 788,107.68 and 312,978.78

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Solution

The fourth proportional to 571,104.99, 788,107.68 and 312,978.78 is: 431,901.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,104.99 : 788,107.68 = 312,978.78 : x
  2. Step 2: Convert to fraction form
    571,104.99/788,107.68 = 312,978.78/x
  3. Step 3: Cross multiply
    571,104.99x = 788,107.68 × 312,978.78
  4. Step 4: Simplify right side
    571,104.99x = 246,660,980,195.03
  5. Step 5: Solve for x
    x = 246,660,980,195.03/571,104.99
  6. Step 6: Final answer
    x = 431,901.29

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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.