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Finding the Fourth Proportional to 620,891.27, 856,191.99 and 518,878.66

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Solution

The fourth proportional to 620,891.27, 856,191.99 and 518,878.66 is: 715,519.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,891.27 : 856,191.99 = 518,878.66 : x
  2. Step 2: Convert to fraction form
    620,891.27/856,191.99 = 518,878.66/x
  3. Step 3: Cross multiply
    620,891.27x = 856,191.99 × 518,878.66
  4. Step 4: Simplify right side
    620,891.27x = 444,259,745,598.58
  5. Step 5: Solve for x
    x = 444,259,745,598.58/620,891.27
  6. Step 6: Final answer
    x = 715,519.39

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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.