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Finding the Fourth Proportional to 450,513.78, 621,778.84 and 256,921.90

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Solution

The fourth proportional to 450,513.78, 621,778.84 and 256,921.90 is: 354,592.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,513.78 : 621,778.84 = 256,921.90 : x
  2. Step 2: Convert to fraction form
    450,513.78/621,778.84 = 256,921.90/x
  3. Step 3: Cross multiply
    450,513.78x = 621,778.84 × 256,921.90
  4. Step 4: Simplify right side
    450,513.78x = 159,748,600,952.60
  5. Step 5: Solve for x
    x = 159,748,600,952.60/450,513.78
  6. Step 6: Final answer
    x = 354,592.04

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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.