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Finding the Fourth Proportional to 805,807.56, 1,111,991.22 and 443,231.40

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Solution

The fourth proportional to 805,807.56, 1,111,991.22 and 443,231.40 is: 611,646.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,807.56 : 1,111,991.22 = 443,231.40 : x
  2. Step 2: Convert to fraction form
    805,807.56/1,111,991.22 = 443,231.40/x
  3. Step 3: Cross multiply
    805,807.56x = 1,111,991.22 × 443,231.40
  4. Step 4: Simplify right side
    805,807.56x = 492,869,425,228.31
  5. Step 5: Solve for x
    x = 492,869,425,228.31/805,807.56
  6. Step 6: Final answer
    x = 611,646.56

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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.