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Finding the Fourth Proportional to 621,723.75, 857,978.56 and 346,075.61

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Solution

The fourth proportional to 621,723.75, 857,978.56 and 346,075.61 is: 477,584.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,723.75 : 857,978.56 = 346,075.61 : x
  2. Step 2: Convert to fraction form
    621,723.75/857,978.56 = 346,075.61/x
  3. Step 3: Cross multiply
    621,723.75x = 857,978.56 × 346,075.61
  4. Step 4: Simplify right side
    621,723.75x = 296,925,453,518.92
  5. Step 5: Solve for x
    x = 296,925,453,518.92/621,723.75
  6. Step 6: Final answer
    x = 477,584.22

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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.