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Finding the Fourth Proportional to 485,543.57, 670,048.00 and 281,635.79

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Solution

The fourth proportional to 485,543.57, 670,048.00 and 281,635.79 is: 388,656.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,543.57 : 670,048.00 = 281,635.79 : x
  2. Step 2: Convert to fraction form
    485,543.57/670,048.00 = 281,635.79/x
  3. Step 3: Cross multiply
    485,543.57x = 670,048.00 × 281,635.79
  4. Step 4: Simplify right side
    485,543.57x = 188,709,493,763.59
  5. Step 5: Solve for x
    x = 188,709,493,763.59/485,543.57
  6. Step 6: Final answer
    x = 388,656.15

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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.