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Finding the Fourth Proportional to 620,145.72, 853,821.46 and 529,136.45

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Solution

The fourth proportional to 620,145.72, 853,821.46 and 529,136.45 is: 728,519.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,145.72 : 853,821.46 = 529,136.45 : x
  2. Step 2: Convert to fraction form
    620,145.72/853,821.46 = 529,136.45/x
  3. Step 3: Cross multiply
    620,145.72x = 853,821.46 × 529,136.45
  4. Step 4: Simplify right side
    620,145.72x = 451,788,055,872.36
  5. Step 5: Solve for x
    x = 451,788,055,872.36/620,145.72
  6. Step 6: Final answer
    x = 728,519.19

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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.