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Finding the Fourth Proportional to 612,978.09, 919,457.88 and 275,780.63

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Solution

The fourth proportional to 612,978.09, 919,457.88 and 275,780.63 is: 413,666.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,978.09 : 919,457.88 = 275,780.63 : x
  2. Step 2: Convert to fraction form
    612,978.09/919,457.88 = 275,780.63/x
  3. Step 3: Cross multiply
    612,978.09x = 919,457.88 × 275,780.63
  4. Step 4: Simplify right side
    612,978.09x = 253,568,668,807.58
  5. Step 5: Solve for x
    x = 253,568,668,807.58/612,978.09
  6. Step 6: Final answer
    x = 413,666.77

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.