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Finding the Fourth Proportional to 839,778.45, 1,178,178.15 and 839,778.45

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Solution

The fourth proportional to 839,778.45, 1,178,178.15 and 839,778.45 is: 1,178,178.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,778.45 : 1,178,178.15 = 839,778.45 : x
  2. Step 2: Convert to fraction form
    839,778.45/1,178,178.15 = 839,778.45/x
  3. Step 3: Cross multiply
    839,778.45x = 1,178,178.15 × 839,778.45
  4. Step 4: Simplify right side
    839,778.45x = 989,408,620,630.87
  5. Step 5: Solve for x
    x = 989,408,620,630.87/839,778.45
  6. Step 6: Final answer
    x = 1,178,178.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.