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Finding the Fourth Proportional to 515,864.19, 773,830.46 and 136,779.64

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Solution

The fourth proportional to 515,864.19, 773,830.46 and 136,779.64 is: 205,178.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,864.19 : 773,830.46 = 136,779.64 : x
  2. Step 2: Convert to fraction form
    515,864.19/773,830.46 = 136,779.64/x
  3. Step 3: Cross multiply
    515,864.19x = 773,830.46 × 136,779.64
  4. Step 4: Simplify right side
    515,864.19x = 105,844,250,147.21
  5. Step 5: Solve for x
    x = 105,844,250,147.21/515,864.19
  6. Step 6: Final answer
    x = 205,178.52

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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.