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Finding the Fourth Proportional to 621,254.84, 857,402.26 and 345,639.98

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Solution

The fourth proportional to 621,254.84, 857,402.26 and 345,639.98 is: 477,022.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,254.84 : 857,402.26 = 345,639.98 : x
  2. Step 2: Convert to fraction form
    621,254.84/857,402.26 = 345,639.98/x
  3. Step 3: Cross multiply
    621,254.84x = 857,402.26 × 345,639.98
  4. Step 4: Simplify right side
    621,254.84x = 296,352,499,998.36
  5. Step 5: Solve for x
    x = 296,352,499,998.36/621,254.84
  6. Step 6: Final answer
    x = 477,022.44

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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.