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Finding the Fourth Proportional to 807,728.89, 1,114,673.43 and 445,165.78

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Solution

The fourth proportional to 807,728.89, 1,114,673.43 and 445,165.78 is: 614,332.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,728.89 : 1,114,673.43 = 445,165.78 : x
  2. Step 2: Convert to fraction form
    807,728.89/1,114,673.43 = 445,165.78/x
  3. Step 3: Cross multiply
    807,728.89x = 1,114,673.43 × 445,165.78
  4. Step 4: Simplify right side
    807,728.89x = 496,214,466,911.23
  5. Step 5: Solve for x
    x = 496,214,466,911.23/807,728.89
  6. Step 6: Final answer
    x = 614,332.94

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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.