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Finding the Fourth Proportional to 628,814.22, 868,340.01 and 399,445.44

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Solution

The fourth proportional to 628,814.22, 868,340.01 and 399,445.44 is: 551,600.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,814.22 : 868,340.01 = 399,445.44 : x
  2. Step 2: Convert to fraction form
    628,814.22/868,340.01 = 399,445.44/x
  3. Step 3: Cross multiply
    628,814.22x = 868,340.01 × 399,445.44
  4. Step 4: Simplify right side
    628,814.22x = 346,854,457,364.05
  5. Step 5: Solve for x
    x = 346,854,457,364.05/628,814.22
  6. Step 6: Final answer
    x = 551,600.85

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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.