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Finding the Fourth Proportional to 686,568.38, 947,562.45 and 380,712.79

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Solution

The fourth proportional to 686,568.38, 947,562.45 and 380,712.79 is: 525,438.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,568.38 : 947,562.45 = 380,712.79 : x
  2. Step 2: Convert to fraction form
    686,568.38/947,562.45 = 380,712.79/x
  3. Step 3: Cross multiply
    686,568.38x = 947,562.45 × 380,712.79
  4. Step 4: Simplify right side
    686,568.38x = 360,749,139,300.92
  5. Step 5: Solve for x
    x = 360,749,139,300.92/686,568.38
  6. Step 6: Final answer
    x = 525,438.03

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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.