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Finding the Fourth Proportional to 619,562.80, 928,177.80 and 319,020.40

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Solution

The fourth proportional to 619,562.80, 928,177.80 and 319,020.40 is: 477,930.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,562.80 : 928,177.80 = 319,020.40 : x
  2. Step 2: Convert to fraction form
    619,562.80/928,177.80 = 319,020.40/x
  3. Step 3: Cross multiply
    619,562.80x = 928,177.80 × 319,020.40
  4. Step 4: Simplify right side
    619,562.80x = 296,107,653,027.12
  5. Step 5: Solve for x
    x = 296,107,653,027.12/619,562.80
  6. Step 6: Final answer
    x = 477,930.01

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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.