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Finding the Fourth Proportional to 619,728, 929,411.76 and 259,888.92

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Solution

The fourth proportional to 619,728, 929,411.76 and 259,888.92 is: 389,757.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,728 : 929,411.76 = 259,888.92 : x
  2. Step 2: Convert to fraction form
    619,728/929,411.76 = 259,888.92/x
  3. Step 3: Cross multiply
    619,728x = 929,411.76 × 259,888.92
  4. Step 4: Simplify right side
    619,728x = 241,543,818,541.70
  5. Step 5: Solve for x
    x = 241,543,818,541.70/619,728
  6. Step 6: Final answer
    x = 389,757.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.