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Finding the Fourth Proportional to 612,943.66, 845,978.75 and 383,607.55

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Solution

The fourth proportional to 612,943.66, 845,978.75 and 383,607.55 is: 529,451.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,943.66 : 845,978.75 = 383,607.55 : x
  2. Step 2: Convert to fraction form
    612,943.66/845,978.75 = 383,607.55/x
  3. Step 3: Cross multiply
    612,943.66x = 845,978.75 × 383,607.55
  4. Step 4: Simplify right side
    612,943.66x = 324,523,835,639.56
  5. Step 5: Solve for x
    x = 324,523,835,639.56/612,943.66
  6. Step 6: Final answer
    x = 529,451.33

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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.