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Finding the Fourth Proportional to 450,638.50, 621,953.56 and 257,109.34

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Solution

The fourth proportional to 450,638.50, 621,953.56 and 257,109.34 is: 354,852.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,638.50 : 621,953.56 = 257,109.34 : x
  2. Step 2: Convert to fraction form
    450,638.50/621,953.56 = 257,109.34/x
  3. Step 3: Cross multiply
    450,638.50x = 621,953.56 × 257,109.34
  4. Step 4: Simplify right side
    450,638.50x = 159,910,069,322.25
  5. Step 5: Solve for x
    x = 159,910,069,322.25/450,638.50
  6. Step 6: Final answer
    x = 354,852.21

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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.