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Finding the Fourth Proportional to 647,290.64, 892,895.30 and 405,152.84

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Solution

The fourth proportional to 647,290.64, 892,895.30 and 405,152.84 is: 558,881.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,290.64 : 892,895.30 = 405,152.84 : x
  2. Step 2: Convert to fraction form
    647,290.64/892,895.30 = 405,152.84/x
  3. Step 3: Cross multiply
    647,290.64x = 892,895.30 × 405,152.84
  4. Step 4: Simplify right side
    647,290.64x = 361,759,063,320.91
  5. Step 5: Solve for x
    x = 361,759,063,320.91/647,290.64
  6. Step 6: Final answer
    x = 558,881.96

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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.