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Finding the Fourth Proportional to 514,219.28, 709,663.56 and 378,871.52

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Solution

The fourth proportional to 514,219.28, 709,663.56 and 378,871.52 is: 522,872.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,219.28 : 709,663.56 = 378,871.52 : x
  2. Step 2: Convert to fraction form
    514,219.28/709,663.56 = 378,871.52/x
  3. Step 3: Cross multiply
    514,219.28x = 709,663.56 × 378,871.52
  4. Step 4: Simplify right side
    514,219.28x = 268,871,311,665.81
  5. Step 5: Solve for x
    x = 268,871,311,665.81/514,219.28
  6. Step 6: Final answer
    x = 522,872.87

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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.