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Finding the Fourth Proportional to 619,783.82, 855,265.74 and 347,826.32

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Solution

The fourth proportional to 619,783.82, 855,265.74 and 347,826.32 is: 479,980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,783.82 : 855,265.74 = 347,826.32 : x
  2. Step 2: Convert to fraction form
    619,783.82/855,265.74 = 347,826.32/x
  3. Step 3: Cross multiply
    619,783.82x = 855,265.74 × 347,826.32
  4. Step 4: Simplify right side
    619,783.82x = 297,483,934,966.28
  5. Step 5: Solve for x
    x = 297,483,934,966.28/619,783.82
  6. Step 6: Final answer
    x = 479,980.16

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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.