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Finding the Fourth Proportional to 781,281, 1,078,137.86 and 441,756.36

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Solution

The fourth proportional to 781,281, 1,078,137.86 and 441,756.36 is: 609,606.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,281 : 1,078,137.86 = 441,756.36 : x
  2. Step 2: Convert to fraction form
    781,281/1,078,137.86 = 441,756.36/x
  3. Step 3: Cross multiply
    781,281x = 1,078,137.86 × 441,756.36
  4. Step 4: Simplify right side
    781,281x = 476,274,256,611.79
  5. Step 5: Solve for x
    x = 476,274,256,611.79/781,281
  6. Step 6: Final answer
    x = 609,606.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.