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Finding the Fourth Proportional to 623,716.40, 860,633.16 and 351,772.40

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Solution

The fourth proportional to 623,716.40, 860,633.16 and 351,772.40 is: 485,392.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,716.40 : 860,633.16 = 351,772.40 : x
  2. Step 2: Convert to fraction form
    623,716.40/860,633.16 = 351,772.40/x
  3. Step 3: Cross multiply
    623,716.40x = 860,633.16 × 351,772.40
  4. Step 4: Simplify right side
    623,716.40x = 302,746,992,212.78
  5. Step 5: Solve for x
    x = 302,746,992,212.78/623,716.40
  6. Step 6: Final answer
    x = 485,392.07

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1.5x scale

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.