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Finding the Fourth Proportional to 668,506.88, 922,390.26 and 396,436.52

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Solution

The fourth proportional to 668,506.88, 922,390.26 and 396,436.52 is: 546,993.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,506.88 : 922,390.26 = 396,436.52 : x
  2. Step 2: Convert to fraction form
    668,506.88/922,390.26 = 396,436.52/x
  3. Step 3: Cross multiply
    668,506.88x = 922,390.26 × 396,436.52
  4. Step 4: Simplify right side
    668,506.88x = 365,669,184,756.30
  5. Step 5: Solve for x
    x = 365,669,184,756.30/668,506.88
  6. Step 6: Final answer
    x = 546,993.90

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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.