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Finding the Fourth Proportional to 571,359.22, 786,680.30 and 485,136.74

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Solution

The fourth proportional to 571,359.22, 786,680.30 and 485,136.74 is: 667,964.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,359.22 : 786,680.30 = 485,136.74 : x
  2. Step 2: Convert to fraction form
    571,359.22/786,680.30 = 485,136.74/x
  3. Step 3: Cross multiply
    571,359.22x = 786,680.30 × 485,136.74
  4. Step 4: Simplify right side
    571,359.22x = 381,647,519,343.77
  5. Step 5: Solve for x
    x = 381,647,519,343.77/571,359.22
  6. Step 6: Final answer
    x = 667,964.23

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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.