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Finding the Fourth Proportional to 519,164.64, 778,284.12 and 279,407.28

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Solution

The fourth proportional to 519,164.64, 778,284.12 and 279,407.28 is: 418,861.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,164.64 : 778,284.12 = 279,407.28 : x
  2. Step 2: Convert to fraction form
    519,164.64/778,284.12 = 279,407.28/x
  3. Step 3: Cross multiply
    519,164.64x = 778,284.12 × 279,407.28
  4. Step 4: Simplify right side
    519,164.64x = 217,458,249,036.39
  5. Step 5: Solve for x
    x = 217,458,249,036.39/519,164.64
  6. Step 6: Final answer
    x = 418,861.83

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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.