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Finding the Fourth Proportional to 805,807.06, 1,111,990.53 and 443,230.90

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Solution

The fourth proportional to 805,807.06, 1,111,990.53 and 443,230.90 is: 611,645.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,807.06 : 1,111,990.53 = 443,230.90 : x
  2. Step 2: Convert to fraction form
    805,807.06/1,111,990.53 = 443,230.90/x
  3. Step 3: Cross multiply
    805,807.06x = 1,111,990.53 × 443,230.90
  4. Step 4: Simplify right side
    805,807.06x = 492,868,563,403.38
  5. Step 5: Solve for x
    x = 492,868,563,403.38/805,807.06
  6. Step 6: Final answer
    x = 611,645.87

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Double scale
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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.