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Finding the Fourth Proportional to 619,820.71, 855,358.93 and 347,883.16

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Solution

The fourth proportional to 619,820.71, 855,358.93 and 347,883.16 is: 480,082.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,820.71 : 855,358.93 = 347,883.16 : x
  2. Step 2: Convert to fraction form
    619,820.71/855,358.93 = 347,883.16/x
  3. Step 3: Cross multiply
    619,820.71x = 855,358.93 × 347,883.16
  4. Step 4: Simplify right side
    619,820.71x = 297,564,965,763.20
  5. Step 5: Solve for x
    x = 297,564,965,763.20/619,820.71
  6. Step 6: Final answer
    x = 480,082.32

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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.