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Finding the Fourth Proportional to 570,789.28, 855,440.31 and 318,059.56

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Solution

The fourth proportional to 570,789.28, 855,440.31 and 318,059.56 is: 476,674.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,789.28 : 855,440.31 = 318,059.56 : x
  2. Step 2: Convert to fraction form
    570,789.28/855,440.31 = 318,059.56/x
  3. Step 3: Cross multiply
    570,789.28x = 855,440.31 × 318,059.56
  4. Step 4: Simplify right side
    570,789.28x = 272,080,969,077.80
  5. Step 5: Solve for x
    x = 272,080,969,077.80/570,789.28
  6. Step 6: Final answer
    x = 476,674.98

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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.